1. technology and computing
2. electronic components

Sample 243-133-VA Electrical Technology Assessments
EVALUATION OF ASSESSMENT TOOLS USED TO MEASURE ACHIEVEMENT OF IET COURSE COMPETENCIES
Please attach copies of all assessment tools used in this section of the course
Instructions: Scroll over Headings to learn more about the requested information
Teacher Name: Louise Robinson
Course Number: 243-133-VA
Competency code and statement:
Elements of the
Competency
(Objectives)
1. Analyse the elements
of an industrial
electronics problem.
Ponderation: 3-2-1
Section Number: all
Semester:A2012
0435 To solve mathematical problems in industrial electronics.
Performance Criteria
(Standards)
1.1 Accurate interpretation
of information
Assessment Tools
All assessments require at least some
calculations.
1
Relevance of Assessment Tool
Information is presented in various formats,
from real-life scenario word problems, to
schematic diagrams, to math problems. In all
cases the students are expected to recognise
what the problem is, organise the known
information, isolate or recognise what is the
missing or unknown information. Early in the
semester the information is easier to organise
than later in the semester.
1.2 Proper determination of
operations to be
performed
2. Solve linear equations
with two variables.
8. Present the results and
explain the problem
Once the student has organised the
information, they will determine what the
unknowns are then will have to use the
appropriate concepts and equations to solve to
find the missing information. In some cases
there may be more than one step and/or more
than one type of mathematical operation to be
performed.
1.3 Accurate interpretation
of units of
measurement
All Assessments.
Students need to read and understand the
technical problems then apply the correct
equation based on the information provided.
The information presented and the results
have to be given in the correct units of
measurement (volts, watts, amps, hertz,
seconds, etc.) and in engineering notation.
2.1 Proper use of
analytical, iterative and
graphic problemsolving methods
All Assignments, quizzes and tests.
Most lab activities and lab test.
Students are presented with mathematical
problems, circuit problems and a real-life
scenario and must interpret the problem, draw
the circuits, select the relevant information
recognise which equations and how they need
to be applied to solve the problems.
2.2 Algebraic
manipulations in
conformity with rules
All assessments
Virtually all assessments require that the
students apply the mathematical and circuit
concepts to solve problems. They must observe
rules regarding units and order of operations in
order to achieve correct responses.
2.3 Accurate calculations.
Required in all assessments.
Engineering notation calculations and algebraic
calculations must be performed accurately in
all assessments.
8.1 Appropriate use of
terminology and
All assessments.
Practicing the use of schematic symbols,
schematic diagrams, engineering notation, use
2
solving approach.
conventions.
8.2 Assessment of
plausibility of results.
of appropriate units (i.e. volts, amperes, watts
etc.) and unit symbols, terminology for
components and appropriate technical
vocabulary.
Students are tested on their understanding of
the use of the technical vocabulary (not on
definitions) on the tests. They are expected to
recognise how the terms should be used.
All assessments.
3
In many of the assignments answers are given
so that students can self-check and in the lab
activities where actual data is worked with the
students are required to check results against
theoretical expectations and explain
differences in terms of the various possible
causes of errors or where ideal assumptions
are made with respect to practical equipment.
Competency code and statement: 0436 To verify extra-low voltage signals and power supplies.
Elements of the
Competency
(Objectives)
1. Prepare to take
measurements or
perform data
acquisition
Performance Criteria
(Standards)
Assessment Tools
Relevance of Assessment Tool
1.1 Accurate interpretation
of drawings, diagrams
and technical
documentation.
Assignments, quizzes, tests and all lab
assessments.
Many of the assessments either provide the
students with diagrams or the details required
to sketch the diagrams. In the case of the lab
activities the students are required to both
sketch the diagrams in their logbooks then
construct the circuits according to their
schematics. The students are required to read
the word problems (many similar to real life
circuits), understand what information is
provided, use that information to find
unknowns and in the case of lab activities,
compare the measured to expected results.
1.2 Accurate interpretation
of the characteristics of
power supplies and
signals.
All lab related activities and the lab
test and assignments.
Students are expected to know what they
should be getting from power supplies and at
various points in the circuit. They use
theoretical calculations to verify expected data
and compare to actual results. They practice
the problem solving prior to activities through
the assignments.
1.3 Determination of the
appropriate measuring
points.
All lab related activities and the lab
test.
Students learn to use the instruments and once
they know how to do that they know how to
place them in the circuit to measure specific
parameters.
1.4 Proper determination
of the frequency and
duration of readings.
Lab activities related to capacitor
charging and discharging.
This relates more specifically to the lab
activates related to the capacitor (I do not have
a word copy of this and will include a separate
pdf). Here the readings have to be taken on a
specific schedule in order to accurately plot the
4
results.
2. Take measurements or
perform data
acquisition.
1.6 Accurate estimation of
values.
All lab related activities and the lab
test.
Students use theoretical calculations to verify
expected data and compare to actual results.
They practice the problem solving prior to
activities through the assignments. For simple
problems they should know what range to
expect the results in.
1.7 Appropriate selection
of devices
All lab related activities and the lab
test.
Students are required to know which
components to use in constructing the circuit,
which side of the power supply is appropriate,
and where they need to use an ammeter
and/or a voltmeter as well as how to use the
meters. They also are introduced to how an
oscilloscope is used to measure time varying
signals.
1.8 Proper inspection and
calibration of devices.
All lab related activities and the lab
test.
Students learn how to place the instruments
on the required ranges – for digital Multimeter
calibration is not required.
2.1 Proper connection of
measuring devices.
All lab activities and lab test.
Students are expected to learn how to properly
connect a voltmeter (across or in parallel) , an
ammeter (in series or in circuit) and a
wattmeter in this course. Students are also are
introduced to the oscilloscope in this course,
although they do not fully understand how to
operate it.
2.2 Accurate, through
measurement of power
supplies and signals.
All lab activities and lab test.
Students are expected to construct the circuits,
take the appropriate measurements and verify
measured results against calculated theoretical
results.
2.3 Appropriate use of
measuring devices.
All lab activities and lab test.
Students are expected to learn how to use the
voltmeter, and ammeter connections of the
5
Multimeter, use a wattmeter and are
introduced to the oscilloscope in this course.
3. Analyse the data.
2.5 Observance of
occupational health
and safety rules.
Required in all laboratory activities
and lab test. Initially all circuits are
verified before power is applied but by
the third activity students are
expected to be more independent on
verifying circuits.
All assessments that require the student to
work in a laboratory setting are relevant to
observing occupational health and safety rules.
3.1 Accurate interpretation
of drawings, diagrams
and technical
documentation.
Assignments, quizzes, tests and all lab
assessments.
Many of the assessments either provide the
students with diagrams or the details required
to sketch the diagrams. In the case of the lab
activities the students are required to both
sketch the diagrams in their logbooks then
construct the circuits according to their
schematics. The students are required to read
the word problems (many similar to real life
circuits), understand what information is
provided, use that information to find
unknowns and in the case of lab activities,
compare the measured to expected results.
3.2 Clear, precise graphic
representations.
Most assignments require that
students draw schematic circuits. This
is also a requirement for some quizzes,
the tests and all lab activities. Students
also learn to draw graphical
representations of electrical signals in
specific labs and assignments.
Students learn to represent circuits using
standard schematic symbols. Students learn to
plot the exponential graph of charging and
discharging capacitors and they work with sine
waves to identify specific parameters such as
frequency, period, amplitude, etc.
3.6 Assessment of
plausibility of results.
All assessments.
The lab activities are where they do actual
measurements but the assignments, quizzes
and test are helping the students learn how to
apply the concepts to real life situations. In
many of the assignments answers are given so
that students can self-check and in the lab
6
activities where actual data is worked with the
students are required to check results against
theoretical expectations and explain
differences in terms of the various possible
causes of errors or where ideal assumptions
are made with respect to practical equipment.
4. Record the
information.
3.7 Proper determination
of conformity of signals
and power supplies.
All laboratory related assessments.
Students are expected to calculate expected
values and record these in their logbooks prior
to constructing the actual circuit. This gives
them values to compare their result to and
verify if the circuit is operating as expected and
results are conforming to expectations (within
a margin of error).
4.1 Use of appropriate
vocabulary.
All assessments use appropriate
vocabulary and students are expected
to write answers using appropriate
vocabulary. This is especially relevant
in the laboratory logbook, the lab test
and the lab report where the students
relate experimental results to
concepts, include explanations of
possible causes of errors, and write
summaries and/or conclusions.
The assessment tools used require the student
to use appropriate vocabulary in their written
aspect of the work.
4.2 Clear presentation of
the methods used and
the results obtained.
All assignments, tests, logbook, lab
test and lab report require that all
work be shown and result be
presented in an appropriate manner.
All are relevant to learning to produce
appropriate and legible documentation of
work.
4.6 Observation of rules of
presentation.
All assignments, tests, logbook, lab
test and lab report require that all
work be shown and result be
presented in an appropriate manner.
All are relevant to learning to produce
appropriate and legible documentation of
work.
7
On tests the students are tested on their
recognition of how the vocabulary should be
used – nuances of the technical vocabulary, not
on definitions.
Competency code and statement: 043B To Adjust the devices in a measuring chain.
Elements of the
Competency
(Objectives)
Performance Criteria
(Standards)
Assessment Tools
4. Inspect the measuring
chain.
4.1 Accurate interpretation
of technical
documentation.
All assessments, including
assignments, quizzes, tests, lab
activities, and lab test.
Students are expected to be able to interpret
problems and circuits presented to them both
in schematic and written format, be able to
follow and construct circuits given diagrams or
written descriptions, understand the
terminology and the units for each parameter
and be able to work with the information.
4.2 Accurate interpretation
of operating data.
All lab related assessments, lab
activities, logbook and lab test.
The students are expected to construct the
activity circuits, take appropriate
measurements, do relevant calculations, find
sources of error and record all information in
their logbooks. They should also be relating
results to theoretical concepts studied.
4.3 Proper determination
of malfunctions.
All lab related assessments, lab
activities, logbook and lab test.
The lab activities and lab test require the
students to construct circuits. It is rare that all
of a student’s circuits work the first time. This
means that the student has to use visual
inspection and instruments to help
troubleshoot their circuits to achieve the
desired results. The logbook is where the
student should be documenting what they do
in an organised fashion, recording calculations
of expected results and documenting
differences and causes of errors.
4.4 Observance of
occupational health
and safety rules.
Required in all laboratory activities
and lab test. Initially all circuits are
verified before power is applied but by
the third activity students are
All assessments that require the student to
work in a laboratory setting are relevant to
observing occupational health and safety rules.
8
Relevance of Assessment Tool
expected to be more independent on
verifying circuits.
My philosophy is that students need to practice to understand the concepts. For this reason I do give many short
assessments in a course – often one per class. The marking is very time consuming but without the practice, the
students would not become comfortable with the concepts and principles being studied in this basic introduction
to electrical concepts course. There is copying that does go on with the assignments, but for the other
assessments independent work is expected. Since I usually give more quizzes (this was a light year for quizzes)
and the quizzes are projected on PowerPoint (and I don’t go back to missed questions for late students), students
are expected to arrive at class and on time and prepared to be tested on the recently covered material.
All assessments are provide to the student in LEA. Quizzes are placed there after the quiz has been held and tests,
except the final, are all handed back. Feedback, including all marking rubrics for logbooks and lab report, as well
as the assessed lab report are also returned to the student in LEA (I have a stylus-touch screen on my laptop that I
use to write on word documents) in pdf format. I have attached a sample lab report at the back of this document
to demonstrate what I mean.
9
Electrical Engineering Technologies
Industrial Electronics Department
Instrumentation & Automation
Assignment 1 – Use loose leaf paper not assignment page
Complete by: Next Wednesday’s class (September 5, 2012)
Please attempt all questions – Quiz on Wednesday.
1. For each of the following perform the calculation and express the response in engineering
notation using the appropriate prefixes and 3 digit responses. This exercise is intended to
help you get familiar with how your calculator works with engineering notation. Watch
the brackets.
You should develop the habit of using the EXP, EE or the 10x keys when entering
exponents.
(a) 153,000 kV
(b) 270,000 s
(c) 0.000034 s
(d)
(e)
Ω
V
(f)
(g)
H
m
(h)
A
V
(i)
2. Express the following in the most sensible engineering notation (use the appropriate
prefixes):
(a) 15800 Volts
(b)
0.000029 s
(c)
0.00033 ms
3. Given V = IR. If I = 2.25 Amps and R = 52.71 Ohms, determine V (volts) to three digits.
4. Draw a table with the Schematic symbols & reference designations for: a resistor, a
capacitor, a dc power source, an ac power source and an inductor.
Complete and bring to class for verification on Wednesday.
2012-Aug-28
A1A-10
Louise Robinson, M. Eng., M.Ed.
Electrical Engineering Technologies
Industrial Electronics Department
Instrumentation & Automation
Assignment #2 – Lecture 2
Due: Monday, September 10, 2012 (hand-in at beginning of class)
Please complete on loose leaf paper – not on this sheet. Since the
answers are provided you must show all your work for full marks,
including all equations and steps.
1. What is the stored charge in coulombs of a charged body with an excess of 4.75 x
1019 electrons? (Ans: -7.61 C)
2. What is the stored charge in coulombs of a charged body with a deficit of 2.12 x 1017
electrons? (Ans: 34.0 mC)
3. During a chemical action in a battery, 80 C of electrons is transferred from the
copper to the zinc plates by the release of 320 J of energy. What is the potential
difference (voltage) between the two terminals? (Ans: 4.00 V)
4. If the current in a circuit is 5.0 A, how long will it take to transport 650 mC of charge?
(Ans: 130 ms)
5. If 500 mC passes a given point in 2.5 minutes, what is the value of the electric
current? (remember to use seconds) (Ans: 3.33 mA)
6. A circuit current of 560 mA is recorded. Determine the charge accumulation that
would occur in 0.75 minutes. (Ans: 25.2 C)
7. How many electrons must be removed from a neutral body in order to give it a
charge of 10.0 C? (Ans: 6.24  1013 electrons)
8. If 60 mC of charge pass a circuit reference point in 1.25 min., determine the circuit
current. (Ans: 800 A)
2010-Aug-31
A2-11
Louise Robinson. M.Eng., M.Ed.
Electrical Engineering Technologies
Industrial Electronics Department
Instrumentation & Automation
Assignment 3 (due Monday, Sept. 17, 2012)
Please show all work and complete the assignment on loose-leaf paper
(use both sides of the paper to be environmentally friendlier)
1. You need to run wire from a panel board to a motor approximately 22 m away. You are planning on
using copper wire. You would naturally prefer to use 12 AWG wire rather than 10 AWG. The size of
wire you will choose will require that the voltage loss in the wire is within an acceptable range
according to the Canadian Electrical Code.
The applied voltage is 120 V and the maximum allowable loss is in the wire is 3% giving a maximum
drop of 3.6 V (120 V  0.03). Since the motor has a full load current of 15 A, this means the maximum
allowable wire resistance is 240 mΩ (3.6  15 A). If this wire resistance is exceeded, the motor will
not have enough voltage to operate properly and will overheat.
a) If the wire is run in a room where the ambient temperature is 20°C, which copper conductor
(AWG 12 or AWG 10) would you choose? Show your work. (AWG 12)
b) If you were required to operate the motor in an unheated shed where the temperature could
vary between -40°C and +40°C, depending on the season would your choice of conductor still be
appropriate? Show your work. If not what AWG size would you choose? (AWG 10)
c) You have been asked to replace the motor with a larger motor that has a full-load current of 18 A
at the same voltage. You need to check if the selected conductors for the 15A motor are suitable
for the 18 A motor under the same working condition (i.e. temperature range). Don’t forget to
recalculate the maximum allowable resistance with the new current. If you need to replace the
conductors, what AWG size is now required? (No need to replace)
2012-Sep-03
A3-12
Louise Robinson, M. Eng., M. Ed.
Electrical Engineering Technologies
Industrial Electronics Department
Instrumentation & Automation
Assignment 4 (due Tuesday, Sept. 25, 2012)
Please show all work and complete the assignment on loose-leaf paper
(use both sides of the paper to be environmentally friendlier)
1.
You are checking the current in a circuit. You measure a 1.3 V drop across a resistor with
three red colour bands and a gold colour band on it (red, red, red, gold).
a) What is the value of the resistor?
b) What is the current going through the resistor? Ans: 591 A
c) What power is being dissipated by the resistor? Ans: 768 W
2.
You have a circuit that is controlled to produce current in the range of 4 to 20 mA. You need
to convert the current to a voltage in the range of from 1 to 5 V. You have been told that all
you need to do is put the appropriate resistor in the circuit and the correct voltage will
appear across it.
a) What is the value of this resistor? Ans: 250 Ω
b) What is the maximum power that this resistor will have to dissipate? Ans: 100 mW
3.
You building a small 10 V power supply on a breadboard. You want a green LED to light up
when the power supply is on. The LED needs between 20 and 25 mA to light up properly.
The closer you are to the 25 mA value the brighter the LED. To control the current you need
to put a resistor in series with the LED. The resistor will have a 8.6 V drop across it.
a) What value of resistor do you need? Choose the closest standard value that fits the
parameters. Ans: 360 Ω
b) What are the colours of the bands on the resistor?
c) What standard power rating should the resistor have? Ans: ¼ watt
4.
Your office is too cold in the winter and you want to bring in a portable heater. You are
considering a 400 W heater. Because of other equipment on the same circuit you want to
make sure the heater does not draw more than 5 A. The voltage available at the outlet is
120 V. What current will that heater draw from the circuit? Is it a good choice in this case?
Ans: Yes (but you have to prove it)
2010-Sep-08
A4-13
Louise Robinson, M. Eng., M. Ed.
Electrical Engineering Technologies
Industrial Electronics Department
Instrumentation & Automation
Assignment 5 (due Tuesday, October. 2, 2012)
Please show all work and complete the assignment on loose-leaf paper (use both
sides of the paper to be environmentally friendlier)
1.
You are working with a circuit with an LED light in it. There are two resistors in series with
the light. When you measure the voltage across the two resistors your meter reads 13.6 V.
The colour bands on the resistors are as follows:
Vin
R1: red, red, brown, gold
R2: yellow, violet, brown, gold
a)
b)
c)
d)
e)
2.
D1
What is the value of each of the resistors?
What current is the LED operating at?
What is the voltage drop across each resistor? (voltage divider)
What is the power dissipated in each resistor?
If the LED drops 1.4 volts, what is the supply voltage Vin?
R2
V 13.6 V
R1
You have a series circuit that consists of 20 miniature Christmas
lights. The light string operates on 120 V.
a) What is the voltage drop across each light?
b) If each light is rated for 1.5 W, what is the current in the circuit?
c) What is the total power of the light string?
3.
You have been asked to set up a circuit with three green LEDS and a resistor (to control the
current) in series with a switch and a 12 volt source. The LEDs are being used as indicators
on panels. You check the LED data sheet and it provides the following relevant information:
VF = 3 V, IF-max = 25 mA, IF-min = 20 mA
To help you figure out the circuit you will be guided through an organized procedure.
a) Draw the schematic diagram of the circuit (reminder: circuit consists of a 12V source, a
switch, a resistor and three LED sockets connected in series (to mount LEDs in). When
drawing the circuit simply draw the LEDs as lights.
b) Calculate the total voltage drops for the LEDs.
c) Calculate the voltage drop across the resistor
d) Use the information provided to calculate and select a standard resistor for the circuit.
e) What is the colour code of the standard resistor you selected above?
2011-Sep-16
A5-14
Louise Robinson, M. Eng., M. Ed.
Electrical Engineering Technologies
Industrial Electronics Department
Instrumentation & Automation
Assignment 6 (due Monday, Oct. 15, 2012)
Please show all work and complete the assignment on loose-leaf paper (use both
sides of the paper to be environmentally friendlier)
1.
a) All unknown currents (I2, I4, I5, & I6)
b) Whose Law are you using to find the
currents?
c) The supply voltage (ES)
d) All unknown resistances.
e) The total resistance of the circuit.
2.
30 mA
For the circuit At right, find the following:
18 mA
I2
8 mA

Es
R1
500 

R2
I6
Given the room lighting circuit at right, where all
light bulbs are rated for 60W, find:
a) Current through each light bulb.
b) Total current demand from the source.
c) Total source power required.
I4
10 mA
R3
R4
I5
S2
Fuse
S1
E
120 V
L1
L2
L3
L4
L5
3.
Repeat question 2 for fluorescent lights with a
rating of 13 W each (equivalent to 60W lights for
lumens)
4.
You have a parallel circuit that consists of 20 Christmas lights. The light string operates on 120 V.
a) What is the voltage drop across each light?
b) If each light is rated for 3 W, what is the current through each light?
c) What is the total circuit current?
d) What is the total power requirement of the light string?
5.
You have gone through your house and found that you have 18 incandescent light bulbs of 60W
each and 5 incandescent light bulbs of 100W each. You want to become more energy efficient and
replace the incandescent lights with compact florescent lights. The 60 W bulbs will be replaced with
13 W bulbs and the 100W bulbs will be replaced with 23W bulbs.
a)
b)
c)
d)
e)
What is the total power demand of the incandescent bulbs?
What is the total current demand of the incandescent bulbs (at 120V)?
What is the total power demand of the florescent bulbs?
What is the total current demand of the florescent bulbs (at 120V)?
There are 16 houses on your block. If everyone did the same as you, how much power would be
saved every hour (note the ratings of 60W, 100W, 13W and 23W are per hour rating) if all lights
were
on
at
the
same
time?
2012-Oct-04
A6-15
Louise Robinson, M. Eng., M. Ed.
Electrical Engineering Technologies
Industrial Electronics Department
Instrumentation & Automation
Assignment 07 (due Monday, October 29, 2012)
Since the answers are being provided for the more difficult problem, you must show all your work for
full marks. If you cannot solve the problem, you can contact me using MIO or drop by my office before
the due date and I will review the problem with you.
Include the schematic Diagrams for your
circuits.
1.
R3
200 
For the circuit at right, solve for the following:
a)
b)
c)
d)
e)
f)
2.
R1
500 
Equivalent resistance of the circuit.
The total current required from the source.
The currents in each of the resistors.
The voltage drops across each resistors.
Total circuit power.
The power dissipated by each resistor.

Es
40 V 
R2
400 
R4
600 
For the circuit at right, find the following:
a) The equivalent circuit resistance (2.676 kΩ)
b) The total circuit current (14.95mA)
c) All resistor currents (I1, I2… to I7)
,
 ,
,

d) All resistor voltage drops (V1, V2, … to V7)
,
,
R1
2.2 k
Es
40 V


R2
1 k
R4
5.6 k
R3
1 k
R5
2 k
R6
2 k
R7
3.3 k
,
,
e) Total power dissipated in the circuit.
2011-Oct-13
A7-16
Louise Robinson, M. Eng., M. Ed.
Electrical Engineering Technologies
Industrial Electronics Department
Instrumentation & Automation
Assignment 8 (due Monday, 2012-Nov-5)
To receive marks for this assignment you must include all equations used and show all
calculations. A mark of 0 will be given for any question or part of question where the work is
not included.
1. Given the circuit at right, knowing:
;
RC
100 
&
RB
10 k
and using KVL, solve for:
a)
b)
c)
C
B
DC
150
VBB 
3V 
(230 A)
(34.5 mA)
(6.55 V)
 V
CC
 10 V
E
R1
150 
2.
For the circuit at right:
a) Given R4 is a short circuit find RT and VAB.
&
b) Given R4 is an open circuit find RT and VAB.
&
c) Given R4 is 3.3 kΩ find RT and VAB
&
2011-Oct-20
A8-17
R4
2.2 k
R2
120 

E
10 V 
A
R3
330 
VA
VB
B
R5
Louise Robinson, M. Eng., M. Ed.
Electrical Engineering Technologies
Industrial Electronics Department
Instrumentation & Automation
Practice Assignment – Not for Submission
This assignment does not have to be submitted to the teacher. This is a pre-test
practice assignment only. If you understand how to do these problems, as well
as the problems on the previous parallel, parallel-series & Loop Analyses
assignments you should be prepared for the problem solving part of the test.
It would be best if you attempted the problems as soon as possible. If you are having difficulty
with any of the questions, email me at: [email protected] or send a MIO. I will
get back to you as soon as I see your message.
1.
36 mA
For the circuit at right, find the following:
a) All unknown currents (I2, I4, I5, & I6)
;
;
14 mA
I2
10 mA
&

Es
b) Whose Law are you using to find the currents?
Kirchhoff’s Current Law
R1
1.2 k

R2
I6
I4
8 mA
R3
R4
I5
c) The supply voltage (ES).
d) All unknown resistances (R2, R3, & R4).
&
e)
2.
The total resistance of the circuit.
For the circuit at right, find the following:
a) The equivalent circuit resistance (600 Ω)
b) The total circuit current (33.33 mA)
c) All resistor currents
A,
Es
20 V


R1
1.2 k
R1
1.8 k
R1
3.6 k
A
A, &
d) All resistor voltage drops (V1, V2, … to V7)
,
e) Total power dissipated in the circuit. (667 mW)
3.
RC
1.5 k
Given the circuit at right, knowing:
;
RB
100 k
&
and using KVL, solve for:
a)
b)
c)
2012-Nov-03
VBB 
5V 
(43 A)
(9.675 mA)
(10.49 V)
AP-18
C
B
DC
 VCC
 25 V
225
E
Louise Robinson, M. Eng., M. Ed.
Electrical Engineering Technologies
Industrial Electronics Department
Instrumentation & Automation
R1
250 
4.
For the circuit at right:
a) Given R4 is a short circuit find RT and VAB.
&
R1
150 
b) Given R4 is an open circuit find RT and VAB.
&
E
25 V

VB
R1
1.2 k
a) The equivalent circuit resistance (2.82 kΩ)
b) The total circuit current (14.18 mA)
c) All resistor currents (I1, I2… to I6)
A, &
Es
40 V


B

R2
470 
For the circuit at right, find the following:
A,
A, &
VA
A
c) Given R4 is 3.3 kΩ find RT and VAB
&
5.
R3
2.5 k
R4
R4
4.7 k
R2
9 k
R3
3 k
R5
2.2 k
R6
2.2 k
A,
A,
d) All resistor voltage drops (V1, V2, … to V7)
,
,
,
,
e) Total power dissipated in the circuit. (567 mW)
Rev: August-2006
19
Prepared by: Louise Robinson
Electrical Engineering Technologies
Industrial Electronics Department
Instrumentation & Automation
Assignment 9 (due Monday, 2012-Nov-12)
To receive marks for this assignment you must include all steps used and show all
calculations. A mark of 0 will be given for any question or part of question where the work is
not included.
1.
Given the circuit below, using the loops indicated, calculate the three loop equations. Include all
steps and state the equation in the final format.
R1
10 k
I1
E
10 V
R3
12 k
R4
15 k
Or
R2
10 k
2.
I2
I3
R5
15 k

For the circuit below, using the loops as indicated, calculate the three loop equations. Include all
steps and state equations in their final reduced format.
E1 
10 V 


I1
R1
5
2012-Nov-03
I2
E2
6V
I3
R2
68 
 E3
 8V
Or
R3
47 
A9-20
Louise Robinson, M. Eng., M. Ed.
Electrical Engineering Technologies
Industrial Electronics Department
Instrumentation & Automation
Assignment 10 due Tuesday, November 20, 2012
1. What does the period of a wave signify? (What information is it giving about the
waveform?)
2. What does the frequency of a wave signify? (what information is it giving about the
waveform?)
3. Assuming steady-state, for the following frequencies, determine the period of the wave.
a)
b)
c)
d)
e)
120 Hz
1000 Hz
25 kHz
260 MHz
2 Hz
4. If you are given the frequency of a wave, what does that tell you about that wave?
5. Assuming steady-state, for the following, determine the frequency of the wave.
a) 16.67 ms
b) 100 s
c) 20 s
d) 25 ms
e) 10 s
6. For the sine wave at right
below, what is:
a)
b)
c)
d)
e)
f)
Period?
Frequency?
Amplitude?
Peak voltage?
Peak-to-peak voltage?
Dc offset voltage?
Volts (V)
80
70
60
50
40
30
20
10
0
-10
20
40
60
80
100
120
t (ms)
-20
2012-Nov-17
A10-21
Louise Robinson, M. Eng., M. Ed.
Electrical Engineering Technologies
Industrial Electronics Department
Instrumentation & Automation
Assignment 11
(due Monday, November 26, 2012)
Please show all work and complete the assignment on loose-leaf paper (use both sides of the paper to
be environmentally friendlier)
1.
For the circuits below, calculate the total capacitance.
C1
10 F
CT
CT
C2
22 F
C3
33 F
f)
C1
10 F
C2
22 F
C3
33 F
b)
C1
22 F
CT
C2
33 F
C3
33 F
c)
2.
You have a box of 10 capacitors of 1.0 F each and your circuit requires a capacitance of 3 F. What
will you do? Explain and sketch the circuit showing the capacitor connections and values. Note you
do not have to use all capacitors.
3.
You were given a bunch of small capacitors with three numbers on them. You have been taught
that the numbers are read as follows: First two numbers – the first two digits representing the
number of picofarads & the third number is exponent for the power-of-ten multiplier.
Example 223 = 22 pF  103 = 22,000 pF or 0.022 F. Note that nF is not a standard measurement for
capacitance.
Identify the capacitance of capacitors with the following numbers:
a) 334
b) 105
c) 222
d) What would you look for if you wanted a 10 F capacitor?
2012-Nov-19
A11-22
Louise Robinson, M. Eng., M. Ed.
Electrical Engineering Technologies
Industrial Electronics Department
Instrumentation & Automation
Assignment 12 – Practice for Final
Please show all work and complete the assignment on loose-leaf paper (use both sides of the paper to
be environmentally friendlier)
1. For the circuit at right below, give that the capacitor has no charge initially. The switch is placed
in position 1.
R
a) Calculate the time constant for the circuit, τ.
10
k
1
b) Determine the capacitor charging equation.
c) Determine the circuit current equation.
2
E
C
d) Compute the capacitor voltage at t = 200 ms.
40 V
22 F
e) Compute the current at t = 200 ms.
f) At what point in time will the circuit be
considered fully charged?
a) 220 ms
b)
e) 1.61 mA
f) 1.10 s
(
⁄
)
c)
(
⁄
)
d) 23.9 V
2. For the same circuit as in question 1, and assuming that the capacitor is fully discharged and the
switch has just been moved to position 1, create a table giving the capacitor voltage (vC) and
current (iC) at: t = 0, t = τ, t = 2τ, t = 3τ, t = 4τ, t = 5τ, and t = 6τ. Form a table with time (t),
capacitor voltage (vC) and circuit current (iC ) as the column headers.
Hint: τ = 220 ms => 2τ = 440 ms etc.
2011-Nov-20
A12-23
Louise Robinson, M. Eng., M. Ed.
Electrical Engineering Technologies
Industrial Electronics Department
Instrumentation & Automation
Assignment 13 – Practice for final
1. For the circuit at right, assume that the
capacior has been fully charged and the
switch is moved to position 2.
1
2
a) Determine the capacitor discharging
E
40 V
equation.
b) Determine the circuit current equation.
c) Compute the capacitor voltage at t = 200
ms.
d) Compute the current at t = 200 ms.
e) At what point in time will the circuit be considered fully discharged?
R
10 k
C
10 F
2. For the same circuit as in question 1 and assuming that the capacitor was fully charged
and the switch has just been placed in position 2, create a table giving the capacitor
voltage (vc) and current (ic) at: t = , t =, t = 2, t = 3, t = 4, t = 5, and t = 6.
3. Redo questions one given that the capacitor in the circuit above has been changed for
one with a capacitance of 33 F. The resistor and source remain unchanged.
2012-Dec-02
A13-24
Louise Robinson, M. Eng., M. Ed.
Electrical Engineering Technologies
Industrial Electronics Department
Instrumentation & Automation
Practice Assignment 14 – Practice only
1. An ac circuit with a supply voltage of E = 60 Vac, with a frequency of 60 Hz has a
resistance of R = 100 Ω, an inductance of L = 200 mH and a capacitance of C = 22 F.
Find the following (and don’t forget to include the units).
a)
b)
c)
d)
e)
Sketch the circuit.
Find the Inductive Reactance.
XL = 75.4 Ω
Find the Capacitive Reactance. XC = 120.6 Ω
Find the Impedance in Rectangular form.
Ω
Find the magnitude of the impedance in polar form. (bonus question) 109.7 Ω
2. A second circuit has a supply voltage of E = 12 Vac, with a frequency of 1.0 kHz. In the circuit
you have a resistance of R = 1 kΩ, and 2 inductors: L1 = 460 mH and L2 = 200 mH; and two
capacitors: C1 = 0.33 F and C2 = 0.22 F all in series.
a)
b)
c)
d)
e)
Sketch the circuit
Find the Inductive Reactance.
XL = 4.147 kΩ
Find the Capacitive Reactance. XC = 1.206 kΩ
Find the Impedance in Rectangular form.
kΩ
Find the magnitude of the impedance in polar form be? (bonus question) 3.106 kΩ
2012-Dec-02
A14-25
Louise Robinson, M. Eng., M. Ed.
Electrical Engineering Technologies
Industrial Electronics Department
Instrumentation & Automation
Quiz 1: Wednesday, September 5, 2012
1. Copy and complete the following table:
Multiplier
10
Prefix
Prefix Symbol
12
109
106
103
10-3
10-6
10-9
10-12
2. Convert the following values to proper engineering notation using the appropriate prefix
symbols (copy the given value first).
(a) 16,000 kV
___________________
(b) 2,700,000 s
___________________
(c) 0.000 000 34 s
___________________
(d) 0.0075 MA
___________________
(e) 163,000,000 W
___________________
2012-Sep-05
Q1-26
Louise Robinson, M.Eng., M.Ed.
Electrical Engineering Technologies
Industrial Electronics Department
Instrumentation & Automation
Quiz 2a – Monday, September 17, 2012
1. List the four main physical factors that the resistance of a conductor depends on.
2. _______________ is a measure of the opposition to the flow of current.
3. _______________ is an intrinsic or characteristic property of a material. It is a measure of the
materials ability to resist the flow or current per unit cross-sectional area per unit length.
4. A _______________ is a circuit component or device possessing a specific resistance that is used to
control current in an electric circuit.
5. _______________ are materials through which an electrical charge can move easily.
6. Give a copper wire where  = 1.723  10-8 -m, the area, A = 0.326 mm2, and R = 15, find the
length of the wire. Assume the measurements are taken at room temperature.
2012-Sep-15
Q2-27
Louise Robinson, M.Eng., M.Ed.
Electrical Engineering Technologies
Industrial Electronics Department
Instrumentation & Automation
Quiz 3 – Tuesday, 2012-Sep-25
1. The resistance of a short circuit is considered to be __________ ohms and the current through
the circuit is considered to be ______ Amps.
2. The resistance of an open circuit is considered to be __________ ohms and the current through
the circuit is considered to be ______ Amps.
3. Current leaves the ___________________ (positive/negative) side of the source.
4. Given a circuit where the supply voltage is 12 V and you measure a current of 48 mA using an
ammeter, what is the circuit resistance?
5. Given the same circuit as in the question previous, a supply voltage of 12 V and a circuit current of 48
mA, what is the power dissipated in the load?
2012-Sep-23
Q3-28
Louise Robinson, M.Eng., M.Ed.
Electrical Engineering Technologies
Industrial Electronics Department
Instrumentation & Automation
Quiz 4a – Tuesday, 2012-Oct-16
Given the circuit at right find:
a)
b)
c)
d)
e)
f)
g)
h)
i)
j)
RT
IT
I1
I2
I3
VT
V1
V2
V3
PT
2012-Oct-16
IT
RT
Q4a-29
I1
I2
I3
R1
18 k
R2
9 k
R3
6 k
Louise Robinson, M.Eng., M.Ed.
Electrical Engineering Technologies
Industrial Electronics Department
Instrumentation & Automation
Quiz 5a – Tuesday, 2012-Nov-06
Given the circuit below:
a) Indicate the current loops with the correct direction.
b) Place the correct signs (+ and ) on all circuit components.
c) Calculate the loop equations and simplify.
R1
400 
R3
300 
R5
450 

R2
600 
E1
40 V
+
E3
25 V
R6
250 
+

+

2012-Nov-05
E2
20 V
Q5a-30
R4
100 
+

E4
10 V
Louise Robinson, M.Eng., M.Ed.
Electrical Engineering Technologies
Industrial Electronics Department
Instrumentation & Automation
Quiz 6 – Tuesday, 2012-Nov-20
1. Given a sinusoidal signal with a frequency of 10 kHz, what is its period?
2. Given a triangle shaped signal with a period of 40 ms, what is its frequency?
3. For the sine wave at below what is the amplitude?
4. For the sine wave at below what is the dc offset voltage?
5. For the sine wave at below what is the:
a) period?
b) frequency
Volts (V)
80
70
60
50
40
30
20
10
0
-10
20
40
60
80
100
120
t (ms)
-20
2012-Nov-05
Q6a-31
Louise Robinson, M.Eng., M.Ed.
Electrical Engineering Technologies
Industrial Electronics Department
Instrumentation & Automation
Quiz 7 – Thursday, 2012-Nov-26
Find the Total Capacitance:
C1
5.6 F
1.
C2
8.2 F
CT
C3
2.7 F
2.
CT
C1
68 F
C2
36 F
C3
75 F
3. Given capacitors with the following codes, state the actual capacitance value.
a) 564
b) 472
4. Given capacitors with the following capacitance value state the three digits codes.
a) 2.2 μF
b) 0.072 μF
2011-Nov-17
Q7-32
Louise Robinson, M.Eng., M.Ed.
50
Electrical Technology
243-133-VA
TEST 1a - Part 1
October 1, 2012
Name:
______________________________________
Please Print
Express all answers with the appropriate
Engineering Prefixes
Electrical Engineering Technologies
Industrial Electronics Department
Instrumentation & Automation
Section A – Fill-in the Blank (1 mark for each blank)
1.
Express each of the following quantities to three digits with the appropriate engineering prefix symbols
on the units.
(a)
0.00785 s
__________________________
(b)
560 000 000 
__________________________
(c)
0.000 022 560 F
__________________________
(d)
40 000 H
__________________________
(e)
0.032 700 kV
________________________
2.
An AWG 14 wire is _______________________ (bigger, smaller) than an AWG 12 wire.
3.
Complete the following with the full name of the appropriate unit.
a)
The unit for electrical power is: _____________________________________.
b) The unit for mechanical power is: _____________________________________.
4.
Current leaves the ______________________________ (positive, negative) side of a source.
5.
The four main factors that the effect the resistance of a conductor are:
________________________________, __________________________________,
________________________________, ___________________________________.
6.
The three basic laws of electricity are:
____________________________________________, _______________________________________
& ____________________________________________________
7.
Complete the following blanks with zero or infinite.
a)
The ideal resistance of a short circuit is __________________________.
b) The ideal resistance of an open circuit is _________________________.
8.
Complete the following with copper, aluminum or gold.
a)
When reliability is a factor, ___________ conductors are used.
b) The most widely used conductor material is ____________________.
c)
When weight is a factor, _____________________ conductors are used.
2012-Sep-24
T1a-34
Louise Robinson, M.Eng., M.Ed.
___
26
Electrical Engineering Technologies
Industrial Electronics Department
Instrumentation & Automation
9.
Given two lengths of wire of the same gauge, the ___________________(shorter, longer) has the greatest
resistance.
10. Complete the following with the name of the appropriate instrument.
a) Current is measured using a/an _____________________________________.
b) Power is measured using a/an _____________________________________.
c) Resistance is measured using a/an _____________________________________.
d) Voltage is measured using a/an _____________________________________.
Section B – Multiple Choice (2 marks for each)
1. Resistance is a measure of
2. Current is a measure of the
a) the ability to conduct current.
a) the potential difference across a circuit.
b) the opposition to current.
b) the number of electrons in a circuit.
c) the opposition to voltage or circuit.
c) the rate flow of charge through a circuit.
d) the ability to conduct electrons.
d) the volts through a circuit.
3. An electrical insulator is a material that
(a) does not conduct current.
4. A resistor with the colour code brown, green,
orange and gold has the nominal value of:
(b) has a high current when it conducts electricity.
(a) 160 Ω
c) 15.0 kΩ
(c) stays cool when it conducts electricity.
(b) 1.5 kΩ
d) 160 kΩ
(d) has a low resistance.
5. In a series circuit
6. The letters AWG stand for:
(a) the power is the same in each element.
a) A Wire Gauge
(b) the current is the same through each element.
b) All wire Gauge
(c) the voltage is the same across each element.
c) American Wiring Gauge
(d) the resistance is the same in each element.
d) American Wire Gauge
7. Ohm’s Law states that:
(a) The current in a resistive circuit is directly proportional to its applied voltage and inversely proportional to
its resistance.
(b) The voltage in a resistive circuit is the same as the current and inversely proportional to the resistance
(c)
The current in a resistive circuit is inversely proportional to its applied voltage and directly proportional to
its resistance.
(d) The resistance in a resistive circuit is equal to the product of the current and the voltage.
2012-Sep-24
T1a-35
Louise Robinson, M.Eng., M.Ed.
___
14
Electrical Engineering Technologies
Industrial Electronics Department
Instrumentation & Automation
8.
Sketch a schematic diagram of a series circuit that includes (all properly connected and labelled): a power
supply, three resistors, an ammeter (anywhere that is correct – your choice), and a voltmeter (measuring the
voltage of the third resistor). Use appropriate schematic symbols. The power supply voltage is 26 V, the three
resistors are: 2.5 kΩ, 3.0 kΩ, & 7.5 kΩ respectively.
(a)
Calculate the total resistance (RT)
___
10
(b) Calculate the current (I )
(c) Calculate the load voltages (V1,V2, & V3)
(d) Calculate the total circuit power (PT) &
e) Mark the voltage signs (, ) on the voltage source and the resistors in your circuit.
Use the space below and show your calculations.
As always, use appropriate engineering prefixes in your answers.
2012-Sep-24
T1a-36
Louise Robinson, M.Eng., M.Ed.
25
Electrical Technology
243-133-VA
TEST 1a - Part 2
October 1, 2012
Name:
______________________________________
Please Print
Express all answers with the appropriate
Engineering Prefixes
Electrical Engineering Technologies
Industrial Electronics Department
Instrumentation & Automation
Tables:
Standard Resistor Values:
10
11
12
13
16
18
20
22
27
30
33
36
43
47
51
56
15
24
39
62
68
75
82
91
Other Tables:
Material
(α) Temperature
Coefficient (ºC-1)
at 20ºC
Gold
0.0034
Silver
0.0038
Aluminum
0.0039
Copper
0.00393
Germanium
-0.048
Silicon
-0.075
Resistivity ()
Material
in Ωm at 20ºC
Silver
1.630  10-8
Copper
1.723  10-8
Gold
2.443  10-8
Aluminum
2.826 10-8
Equations:
[
]
[
or
]
Constants:
2012-Sep-24
1a-38
By: Louise Robinson, M.Eng., M.Ed.
Electrical Engineering Technologies
Industrial Electronics Department
Instrumentation & Automation
1.
A series circuit consists of a dc source, a resistor and an ammeter.
(a)
Sketch and properly label the circuit below (use the correct schematic symbols).
(b)
If 350C passes through the ammeter in 5 ms, what will the ammeter read?
(c)
If the voltage source consists of a single 1.5 V dc cell, what is the value of the resistor?
___
6
2.
What is the resistance of 400 m of AWG 18 copper wire at:
a) 20C? (remember that  is given at 20°C, room temperature).
b) 42C?
___
6
2012-Sep-24
1a-39
By: Louise Robinson, M.Eng., M.Ed.
Electrical Engineering Technologies
Industrial Electronics Department
Instrumentation & Automation
3.
What is the resistance of an electric kettle when a 120 V drop across it causes a 7.5A current through it?
___
3
4. When installing a mixer control circuit you have been asked to include an indicator light (LED) to ensure that
the operator on a panel knows the mixer is on (he can’t see the process from his seat at the control panel). The
voltage available at the panel is 24 V. You will need a resistor in series with the LED to ensure the LED gets the
right operating current. The large bright green LED you selected has the following information on its data sheet:
Vf = 3.4 V (ON voltage value), If-max = 40 mA, If-min = 30 mA.
(a) Sketch and properly label a schematic diagram of the circuit below.
(b) What voltage will drop across the resistor when the LED is operating properly?
(c) Select a standard resistor that you could use for the circuit and have the LED stay within its specifications.
What is the colour code of the resistor? (answer in the space provided below)
(d) If this resistor is not available, is there another one that will work just as well? What is its colour code?
___
10
R = _______________ colour bands: _________________________________________________________
R = _______________ colour bands: _________________________________________________________
2012-Sep-24
1a-40
By: Louise Robinson, M.Eng., M.Ed.
Electrical Engineering Technologies
Industrial Electronics Department
Instrumentation & Automation
2012-Sep-24
1a-41
By: Louise Robinson, M.Eng., M.Ed.
46
Electrical Technology
243-133-VA
TEST 2a
Closed Book
November 12, 2012
Name:
______________________________________
Please Print
Express numerical answers with the appropriate
Engineering Prefixes.
Electrical Engineering Technologies
Industrial Electronics Department
Instrumentation & Automation
Multiple Choice (2 points each)
1.
Since a voltmeter must be placed across an element to measure its voltage:
a) the reading is the same independent of meter resistance.
b) it must have a very high resistance to work properly.
c) it must have a very low resistance to work properly.
d) voltmeters are connected in series.
2.
Ohm’s Law states that
a) the voltage in a resistive circuit is the same as the current and inversely proportional to the resistance.
b) the current in a resistive circuit is inversely proportional to its applied voltage and directly proportional to
its resistance.
c)
the current in a resistive circuit is directly proportional to its applied voltage and inversely proportional to
its resistance.
d) the resistance in a resistive circuit is equal to the product of the current and the voltage.
3.
Two rules to consider when analyzing series-parallel circuits are:
a) the same current occurs across all series elements; and
the same voltage occurs through all parallel elements.
b) the same current occurs through all series elements; and
the same voltage occurs across all parallel elements.
c) the same current occurs across all parallel elements; and
the same voltage occurs through all series elements.
d) the same current occurs through all parallel elements; and
the same voltage occurs across all parallel elements.
4.
In a parallel circuit the
a) resistance is the same for each element.
b) voltage is the same across each element.
c) current is the same through each element.
d) power dissipation is the same for each element.
5.
Kirchhoff’s Current Law states:
a) the number of currents entering a node is equal to the number of currents leaving the node.
b) the current in all branches at the same node is equal.
c) the current leaving a node has to be less than the current entering the node.
d) the sum of the currents entering a node is equal to the sum of the currents leaving the node.
2012-Nov-08
2a-43
Louise Robinson, M. Eng.; M.Ed.
___
10
Electrical Engineering Technologies
Industrial Electronics Department
Instrumentation & Automation
6.
For the circuit shown below, find the total resistance (RT), the total current supplied by the source (IT), the
voltage across each resistor (V1, V2, V3) and the current in each of the branches (I1, I2, I3).
E = 24 V
R1 = green, blue, red
R2 = red, yellow, red
R3 = orange, white, red
IT
I1
E
+

I2
R1
I3
R2
R3
R1 = ______________
R2 = _______________
R3 = _______________
RT = ______________
IT = _______________
V1 = ______________
V2 = _______________
V3 = _______________
I1 = ______________
I2 = _______________
I3 = _______________
___
11
2012-Sep-24
1a-44
By: Louise Robinson, M.Eng., M.Ed.
Electrical Engineering Technologies
Industrial Electronics Department
Instrumentation & Automation
7.
For the circuit at right find:
R1
440 
a) total circuit resistance
b) total circuit current
c) total circuit power

E
28 V 
d) current through each resistor &
R2
800 
R3
800 
R5
2.4 k
R4
1.2 k
e) voltage across each resistor.
___
13
2012-Sep-24
1a-45
By: Louise Robinson, M.Eng., M.Ed.
Electrical Engineering Technologies
Industrial Electronics Department
Instrumentation & Automation
8.
Given the circuit below:
a) Indicate the current loops with the correct direction.
b) Place the correct signs (+ and ) on all unmarked circuit components.
c) Calculate the loop equations and simplify.
R1
2.2 k
R4
3.9 k
R6
7.2 k
+

E1
40 V
+
E2
30 V
R7
4.8 k
R2
2.5 k

R5
3.3 k
R3
1.2 k
+

E3
25 V
___
12
2012-Sep-24
1a-46
By: Louise Robinson, M.Eng., M.Ed.
68
5
Electrical Technology
243-133-VA
Final Test 3a
Closed Book
December 11, 2012
Name: ______________________________________
Please Print
Express all answers in the appropriate Engineering Units
Any Equations provided will be on the back of your cover page
Electrical Engineering Technologies
Industrial Electronics Department
Instrumentation & Automation
Equations provided:
⁄
(
)
⁄
⁄
2012-Dec-06
3a-48
Louise Robinson, M. Eng., M.Ed.
Electrical Engineering Technologies
Industrial Electronics Department
Instrumentation & Automation
Section 1: Multiple-Choice & Fill-in the Blank (2 each)
1.
The frequency of an ac waveform is
a)
always 60 Hz.
c) the number of cycles in one second.
b) the time for one cycle.
2.
d) the same as the period.
The period of a waveform is:
a)
always 60 Hz.
c) the number of cycles in one second.
b) the time for one cycle.
3.
d) the same as the frequency.
The amplitude of an ac waveform is:
a)
the distance from the 0 axis to the peak.
c) the distance between the two peaks.
b) the distance from the average to the peak.
4.
d) always the same as the peak voltage.
The peak value of an ac waveform is:
a)
the distance from the 0 axis to the peak.
c) the distance between the two peaks.
b) the distance from the average to the peak.
5.
How long does it take an uncharged capacitor to reach full charge?
a)
6.
d) always the same as the peak voltage.
1τ
b) 3 τ
c) 5 τ
d) 7 τ
Which of the following statements is true? Read carefully!!
a)
Resistance opposes current, inductance opposes change in voltage and capacitance opposes change in
current.
b) Resistance opposes current, inductance opposes change in current and capacitance opposes change in
voltage.
c)
Resistance opposes voltage, inductance opposes change in voltage and capacitance opposes changes in
current.
d) Resistance opposes voltage, inductance opposes current and capacitance opposes power.
7.
You are in the process of analysing a circuit. You note that the current is leading the voltage by 90° (using an
oscillocope) in your circuit. Is the circuit inductive or capacitive?
Ans: _______________________________
8.
You observe a sinewave on an oscilloscope with a frequency of 5 kHz. What is the period of the wave?
Ans: _______________________________
9.
The unit for capacitance is: _________________________________
10. The unit for angular velocity is: _________________________________
11. The unit for reactance is: _________________________________
12. The unit for inductance is: _________________________________
2012-Dec-06
3a-49
Louise Robinson, M. Eng., M.Ed.
24
Electrical Engineering Technologies
Industrial Electronics Department
Instrumentation & Automation
13. Using the appropriate letters, fill in the blanks next to the descriptive characteristics of the waveforms. Note
that some blanks may have more than one correct response and some letters may be used more than once
and all are required for full marks. You will also lose marks if you include wrong answers among the correct
answers.
i (amps)
v (volts)
f
a
e
d
c
b (ms)
h (ms)
8
For the above current waveform:
For the above voltage waveform:
Amplitude :
________________
Amplitude:
_________________
Peak Value:
________________
Peak Value:
_________________
Peak-to-peak: ________________
Peak-to-peak: _________________
Period:
Period:
________________
_________________
14. A parallel circuit consists of three capacitors (C1 = 7.2F, C2 = 8.6 F and C3 = 72 F), and an ac voltage source
(E = 12 V).
a)
Draw and label the circuit in the space provided at right below.
b) What is the equivalent capacitance of this circuit? (Write the equation used to solve this)
4
2012-Dec-06
3a-50
Louise Robinson, M. Eng., M.Ed.
Electrical Engineering Technologies
Industrial Electronics Department
Instrumentation & Automation
15. The same three capacitors and source are now placed in series.
a)
Draw and label the circuit in the space provide on the right below.
b) What is the equivalent capacitance of this circuit? (Write the equation used to solve this)
16. You are troubleshooting a circuit and need to replace a capacitor. You suspect the problem is that the
capacitor with the numbers 334 printed on it is not working.
a)
What is the actually capacitance of this capacitor?
b) You have two boxes of 20 capacitors each on hand; one box where the capacitors are labelled 224 and in
the second box the capacitors are labelled 114. What is the minimum number of capacitors you would
require to replace the faulty capacitor with the numbers 334 printed on it?
c)
How would you connect together the capacitors you choose? Sketch the circuit identifying the terminals
you would place in the circuit. Assume the capacitors are polarized.
6
2012-Dec-06
3a-51
Louise Robinson, M. Eng., M.Ed.
Electrical Engineering Technologies
Industrial Electronics Department
Instrumentation & Automation
17. Given a series RC circuit with E = 175 V dc, R = 25k and C = 0.22F:
a) Sketch the circuit
b) Calculate the circuit time constant τ
c)
Write the expression for the capacitor charging voltage (include all known values).
d) Write the expression for the circuit current (include all known values)
e) Calculate the capacitor voltage at time, t = 10 ms.
f)
Calculate the circuit current at t = 10 ms.
12
2012-Dec-06
3a-52
Louise Robinson, M. Eng., M.Ed.
Electrical Engineering Technologies
Industrial Electronics Department
Instrumentation & Automation
18. Given a series ac circuit with a supply voltage of E = 30 Vac at 2 kHz, a resistance of R = 2.4 kΩ, an
inductance of L = 400 mH and a capacitive of C = 0.033 F.
a)
b)
c)
d)
e)
Sketch and label the circuit.
Calculate the angular velocity.
Calculate the inductive reactance.
Calculate the capacitive reactance.
Find the circuit impedance in rectangular form.
10
2012-Dec-06
3a-53
Louise Robinson, M. Eng., M.Ed.
Electrical Engineering Technologies
Industrial Electronics Department
Instrumentation & Automation
RESISTOR COLOUR CODE
Objective:
-
-
To discover and learn the resistor colour code
To verify the concept of resistance
To practice using an ohmmeter
Using known and unknown resistances,
o to verify the operation of the ohmmeter
o to develop and document a procedure to verify resistor colour code
o to record observations and results in an organised format
To devise an acronym to help you remember the resistor colour code
Preamble:
In this lab activity students will have the opportunity to become familiar with: the operation and use
of an ohmmeter; the concept of resistance; and the measuring of resistance. Students will also,
through experimentation, discover and practice using the resistor colour code to read resistor
values.
Procedure:
1.
2.
3.
4.
5.
6.
7.
8.
Working with other group members, using bench equipment and any material provided, devise
a procedure to determine the operation of the ohmmeter.
Record the procedure in your logbooks (or on a piece of paper if you do not have your logbook
yet).
Once the operation of the ohmmeter is understood, devise a procedure where, with the
ohmmeter, you can determine the resistor colour code. Present and explain the procedure to the
teacher.
Once the procedure has been agreed on, through experimentation, use the procedure to discover
the resistor colour code (the number assigned to each of the colours listed alphabetically
below).
Record all observations and measurements in your logbook (everything you did and saw).
Using a table or chart might make the data more readable.
After you have “discovered” the colour code, verify it with your teacher.
The final step is to come-up with a saying that will help you remember the colour code in the
future. The usual method is the first letter of each word in the saying is the same as the first
letter of the colour – in numeric order.
Submit your “logbook” to the teacher before you leave the class.
Black – Blue – Brown – Green – Grey – Orange – Red – Yellow – Violet - White
2012-Aug-28
54
Louise Robinson, M.Eng; M.Ed.
Electrical Engineering Technologies
Industrial Electronics Department
Instrumentation & Automation
FINDING A SHORT CIRCUIT
Objective:
To find the length of a given wire using available information and without making a linear
measurement.
Achievement Context:
Working with the knowledge of resistivity, knowledge of the AWG wire size, AWG tables and
measured wire resistance, to be able to calculate the length of a given wire at an ambient
temperature of 20C.
Preamble
In this lab activity students will investigate one method used to locate short circuits in wires.
This will require that the students be able to apply the theoretical knowledge related to the
resistance of wires to a practical situation.
Equipment



Wire
Multimeter
Banana to alligator clips
Equation:
where  for copper is 1.723 x 10-8
Procedure
1.
2.
3.
4.
5.
6.
7.
8.
9.
Working with other group members, using bench equipment and any material provided,
devise a procedure to determine the length of the given wire.
Record the procedure in your logbooks.
Present and explain the procedure to your teacher.
Once the procedure has been agreed upon, follow the procedure to discover the length of
the given wire.
Verify the length by measuring the wire.
Record all observations, measurements and calculations in your logbook (everything you
did and saw). Ensure all data is properly recorded in an appropriate format (table, listed
etc.).
Document the effectiveness of your procedure and any reasons the results may not have
been as accurate as expected.
If you have time, repeat for another wire.
Have your logbook signed by your teacher before you leave the lab class.
2012-Sep-10
55
Louise Robinson, M.Eng., M. Ed.
Electrical Engineering Technologies
Industrial Electronics Department
Instrumentation & Automation
VOLTAGE, CURRENT, RESISTANCE
Objective:
- To discover the relationship between voltage, current and resistance in a circuit with a
single resistor.
Preamble
In this lab activity students, while discovering the relationship between voltage, current and
resistance will have the opportunity to become familiar with the bench power supply, and the
multimeters.
The power supply voltage should be limited to 30V or less. Use a voltmeter to verify it when
adjusting the value.
Equipment




Resistors
Power supply
Wires with banana plugs
Multimeters
Procedure
1. Working with other group members, using bench equipment and any material provided,
devise a procedure to determine the relationship between voltage, current and resistance.
2. Record the procedure in your logbooks.
3. Present and explain the procedure to your teacher.
4. Once the procedure has been agreed upon, follow the procedure to discover the
relationship between voltage, current and resistance (through experimentation).
5. Record all observations and measurements in your logbook (everything you did and saw).
Ensure all data is properly recorded in table form (if appropriate).
6. After you have “discovered” the relationship demonstrate it to your teacher.
7. Document the relationship and any relevant details in your logbook.
8. Sub it your “logbook” to the teacher for signature before you leave the class.
9. Hand in a short one page typed summary explaining the activity and any conclusions
reached (1 per student). Use font size 12 and 1.5 line spacing.
2010-09-16
56
Louise Robinson, M.Eng., M. Ed.
Electrical Engineering Technologies
Industrial Electronics Department
Instrumentation & Automation
ONE RESISTOR, TWO RESISTOR THREE
SERIES CIRCUITS – OTHER DROPS
Objective:
-
Working with your knowledge of Ohm’s Law and Kirchhoff’s oltage Law and with the
appropriate bench equipment, to observe and document the voltage, current and
resistance relationships that exist in a Series Circuit.
Preamble
In this lab activity students, will investigate the voltage, current and resistance relationships in a
series circuit consisting of three known resistors, and a power source. Among concepts tested
should be circuit position: the relationship between voltage, current and resistance in a series
circuit and the positional effect of the series elements (resistors and supply) in the circuit.
The power supply voltage should be limited to 20V or less. Use the voltmeter on the power
supply to verify the voltage when adjusting the value.
Equipment




Resistors
Power supply
Wires with banana plugs
Multimeters
Procedure
1. Working with other group members, using bench equipment and any material provided,
devise a procedure to determine the voltage, current and resistance relationships in a
series circuit.
2. Record the procedure in your logbooks, including any required circuit diagrams.
3. Present and explain the procedure to your teacher.
4. Once the procedure has been approved by your teacher, follow your procedure to discover
the application of the concepts of voltage, current and resistance to a series circuit
(through experimentation).
5. Record all observations and measurements in your logbook (everything you did and saw).
Ensure all data is properly recorded in table form (if appropriate). Ensure that you have
collected enough data to validate the experiment.
6. After you have “discovered” the relationships demonstrate them to your teacher.
7. Document the relationship (equations and words) and any relevant details in your logbook.
8. Submit your “logbook” to the teacher to be signed before you leave the class.
9. For next lab class, write a short one page summary in your logbook explaining the activity
and any conclusions reached. This part is individual work – not to be copied between lab
partners or anyone else.
2012-Sep-25
57
Louise Robinson, M.Eng., M. Ed.
Electrical Engineering Technologies
Industrial Electronics Department
Instrumentation & Automation
ONE RESISTOR, TWO RESISTOR THREE
SERIES CIRCUITS – OTHER DROPS
Objective:
-
Working with your knowledge of Ohm’s Law and Kirchhoff’s oltage Law and with the
appropriate bench equipment, to observe and document the voltage, current and
resistance relationships that exist in a Series Circuit.
Preamble
In this lab activity students, will investigate the voltage, current and resistance relationships in a
series circuit consisting of three known resistors, and a power source. Among concepts tested
should be circuit position: the relationship between voltage, current and resistance in a series
circuit and the positional effect of the series elements (resistors and supply) in the circuit.
The power supply voltage should be limited to 20V or less. Use the voltmeter on the power
supply to verify the voltage when adjusting the value.
Equipment




Resistors
Power supply
Wires with banana plugs
Multimeters
Procedure
1. Working with other group members, using bench equipment and any material provided,
devise a procedure to determine the voltage, current and resistance relationships in a
series circuit.
2. Record the procedure in your logbooks, including any required circuit diagrams.
3. Present and explain the procedure to your teacher.
4. Once the procedure has been approved by your teacher, follow your procedure to discover
the application of the concepts of voltage, current and resistance to a series circuit
(through experimentation).
5. Record all observations and measurements in your logbook (everything you did and saw).
Ensure all data is properly recorded in table form (if appropriate). Ensure that you have
collected enough data to validate the experiment.
6. After you have “discovered” the relationships demonstrate them to your teacher.
7. Document the relationship (equations and words) and any relevant details in your logbook.
8. Submit your “logbook” to the teacher to be signed before you leave the class.
9. For next lab class, write a short one page summary in your logbook explaining the activity
and any conclusions reached. This part is individual work – not to be copied between lab
partners
or
anyone
else.
2012-Sep-25
58
Louise Robinson, M.Eng., M. Ed.
Electrical Engineering Technologies
Industrial Electronics Department
Instrumentation & Automation
ONE RESISTOR, TWO RESISTOR, THREE - V2
Objective:
-
Working with the knowledge of Ohm’s Law and Kirchhoff’s Laws and with appropriate
bench equipment, to discover the voltage, current and resistance relationships that exist
in a Parallel Circuit.
Preamble
In this lab activity students, will investigate the voltage, current and resistance relationships in a
parallel circuit consisting of three known resistors. The concept of relative position of the
component should also be tested: Are circuit values (current, voltage, total resistance) changed
when the order of the circuit elements is changed? And if so, which parameters change?
The power supply voltage should be set to 20V. Use a voltmeter to verify the power supply
setting when making adjustments.
Equipment




Resistors (1 kΩ, 5 kΩ and 10 kΩ)
Power supply
Wires with banana plugs
Multimeters
Procedure
1.
2.
3.
4.
5.
6.
7.
8.
9.
Working with other group members, taking into consideration the available bench
equipment and any other material provided, devise a procedure to determine the voltage,
current and resistance relationships in a parallel circuit.
Record the procedure in your logbooks.
Present and explain the procedure to your teacher.
Note that one of the first steps in your procedure should include a table of all calculated
expected values for your circuit. You can use a separate table for calculated and measured
or create a table that includes both sets of values. Suggested variables include: REQ, R1, R2,
R3, E, V1, V2, V3, IT, I1, I2, & I3.
Once the procedure has been agreed upon, follow the procedure to discover the
application of the concepts of voltage, current and resistance to a parallel circuit (through
experimentation).
Record all observations and measurements in your logbook (everything you did and saw).
Ensure all data is properly recorded in a properly labelled table form (if appropriate).
After you have “discovered” the relationships demonstrate them to your teacher.
Document the relationships (equations and words) and any relevant details in your
logbook.
Hand in your logbook for assessment at the end of the activity.
2012-Oct-14
59
Louise Robinson, M.Eng., M. Ed.
Electrical Engineering Technologies
Industrial Electronics Department
Instrumentation & Automation
PARALLEL CIRCUITS – EQUIPMENT LOADING
Objective:
-
Working with the knowledge of Ohm’s Law and Kirchhoff’s Laws and with appropriate
bench equipment, to discover the loading effect of a voltmeter when placed in parallel
with a resistor.
Preamble
In this lab activity students, will investigate the voltage, current and resistance relationships in a
parallel circuit consisting of a known resistor and a voltmeter. The concept of equipment
loading in a parallel circuit will be investigated.
The power supply voltage should be limited to 30V or less. Use a voltmeter to verify the value
when making adjustments.
Equipment




Resistor (3 M) & 1.0 k
Power supply
Wires with banana plugs
Multimeters
Procedure
1.
2.
3.
4.
5.
6.
7.
Working with other group members, taking into consideration the available bench
equipment and any other material provided, devise a procedure to determine the circuit
resistance, and current with and without the voltmeter in the circuit.
Record the procedure in your logbooks.
Present and explain the procedure to your teacher.
Once the procedure has been agreed upon, follow your original or edited procedure to
discover (through experimentation) the loading effect of the DDM used as a voltmeter.
Record all observations and measurements in your logbook (everything you did and saw).
Ensure all data is properly recorded in a properly labelled table form (if appropriate).
Document the relationships (equations and words) and any relevant details in your
logbook.
Before the next lab class, write in your logbook a short one half to one page summary
explaining the activity in detail (what you did and saw and learned) and any conclusions
reached.
2012-Oct-30
60
Louise Robinson, M.Eng., M. Ed.
Electrical Engineering Technologies
Industrial Electronics Department
Instrumentation & Automation
BUILDING BRIDGES – V2
Objective:
-
Working with the knowledge of Ohm’s Law and Kirchhoff’s Laws, and with appropriate
bench equipment, to verify the operation of a Series parallel circuit that includes an
unbalanced Wheatstone Bridge.
Preamble
In this lab activity students, will investigate the voltage, current and resistance relationships in a
parallel-series circuit, one with a series resistor between the source and a Wheatstone bridge.
Students will calculate expected values and following that, through experimentation verify that
there is a correlation between expected and measured values.
The power supply voltage should be set to 10V. Use a voltmeter to verify the value when
making adjustments. Remember to turn off the power when making any changes.
Equipment




Resistors (50 Ω, 75 Ω, 100 Ω, 5 kΩ & 10 kΩ)
Power supply (set to 10 V)
Wires with banana plugs
Multimeters
Procedure
1.
2.
3.
4.
5.
6.
7.
Working with other group members, taking into consideration the bench equipment and
any other material provided, devise a procedure and follow it to determine the voltage,
current and resistance relationships in the above Bridge circuit.
Record the calculations and results in your logbooks.
Present and verify your results to your teacher prior to wiring the circuit.
Once the calculated results have been verified, connect the circuit and verify all voltages
and currents.
Record all observations and measurements in your logbook (everything you did and saw).
Ensure all data is properly recorded in a properly labelled table form (if appropriate).
After you have verified the relationships record the details and any relevant information
(observations, equations, possible causes of errors, comments etc.) in your logbook.
Submit your “logbook” for review to the teacher before you leave the class.
2012-Nov-06
61
Louise Robinson, M.Eng., M. Ed.
Electrical Engineering Technologies
Industrial Electronics Department
Instrumentation & Automation
R1
50 
R2
75 

E
10 V 
5 k
VA
A
R3
100 
2012-Nov-06
R4
62
VB
B
R5
10 k
Louise Robinson, M.Eng., M. Ed.
Electrical Technology
243-133-VA
LAB TEST 1A
December 4, 2012
Name:
______________________________________________________________
Please Print
SECTION
WEIGHT
Construction and Operation
35
Measurements
35
Calculations
20
Test Logbook Notes
10
Electrical Engineering Technologies
Industrial Electronics Department
Instrumentation & Automation
LAB TEST 1A
2012-Dec-04
Objective:
-
To connect a given series-parallel circuit and to measure current flow and voltage drops
in the given series parallel circuit.
Circuit:
R1
100 
E
12 V
+

R2
75 
R4
1.0k
R3
25 
R5
50 
Properly wire the above circuit. Using the appropriate bench measuring instruments, measure the
indicated values and complete the following tables, as required. Show all work.
Table
Measured
Calculated
Measured
V1
I1
V2
I2
V3
I3
V4
I4
V5
I5
2012-Dec-02
LT1a-64
Calculated
Louise Robinson, M.Eng., M. Ed.
Electrical Engineering Technologies
Industrial Electronics Department
Instrumentation & Automation
Logbook:
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
2012-Dec-02
LT1a-65
Louise Robinson, M.Eng., M. Ed.
Electrical Engineering Technologies
Industrial Electronics Department
Instrumentation & Automation
Name: ___________________________________
Evaluation Sheet - Lab Test

Section:
Construction & Operation:
 Power supply connected properly and
o Turned on properly
o Set to correct value
o Polarity correct
 Layout follows the schematic
o Correct resistors in correct location
Measurements:
 Voltmeter placed in circuit properly (across each resistor to measure voltage)
o Voltage values are correct (readings across all 5 resistors: V1 to V5)
 Ammeter placed in circuit properly (in series with relevant component)
o Current values are correct (readings for all 5 currents are correct)
Calculations:
 Voltage values are calculated correctly (for all 5 resistors: V1 to V5)
 Currents are calculated correctly for all 5 values.
Lab Log:
 Proper notes on the activity including
o Equations
o Calculations
o Explanations
Total
Mark
35
35
20
10
%
Mrk
4
3
3
10
15
2.5
15
2.5
15
10
10
2
2
6
100
15
Name,
2012-Dec-4
Louise Robinson, M. Eng., M.Ed.
Electrical Engineering Technologies
Industrial Electronics Department
Instrumentation & Automation
LOGBOOK – MARKS AND COMMENTS
Name:
Name
Date: 2012-Sep-11
Activity
Procedure
A1
2.5
A2
3
Schematic
Equations
Data Sketch
Calculations
2.5
Explanations
2.5
2.5
Table/Data
5
2
Total
Activity
Mark
LA1
+ 8
LA2
+ 8
Total
Comments
/36
Name,
Note – A participation mark out of 8 is included in this calculation. This is for being present for the entire
activity to participate with your group/partners. Not being there is unfair to other group members and
increases their workload with respect to the activity.
2012-Sep-15
67
Louise Robinson, M.Eng., M.Ed.
Electrical Engineering Technologies
Industrial Electronics Department
Instrumentation & Automation
LOGBOOK – MARKS AND COMMENTS
Name:
Name
Date: 2012-Oct-02
Activity
A3
A4
A5
Procedure
1
1
1.5
Schematic
1.5
1.5
1.5
Equations
1.5
1
1
Data Sketch
1.5
Calculations
1.5
1
1.5
Explanations
2
2
2.5
Table/Data
1
1.5
2
Summary
2
Total
Activity
Mark
LA3
+8
LA4
+8
LA5
+8
Total
/54
Comments
Name,
Logbooks need to follow the example logbook page for the formatting. You need to include
the proper header (date, activity name and partner name) and footer (“from”, page
number, and “to”). You also are supposed to make your logbook easy to read and follow.
Note – A participation mark out of 8 is included in this calculation. This is for being present for the entire
activity to participate with your group/partners. Not being there is unfair to other group members and
increases their workload with respect to the activity.
2012-Oct-01
68
Louise Robinson, M.Eng., M.Ed.
Electrical Engineering Technologies
Industrial Electronics Department
Instrumentation & Automation
LOGBOOK – MARKS AND COMMENTS
Name:
Name
Date: 2012-Oct-16
Activity
A6
A7
Procedure
1
1
Schematic
1.5
1.5
Equations
1
1
Calculations
1.5
1.5
Table/Data
1.5
1.5
Explanations & Summary
2
2
Formatting & Neatness
1.5
1.5
Data Sketch
Total
Activity
Mark
LA6
+8
LA7
+8
Total
/36
Comments
Name,
Logbooks need to follow the example logbook page for the formatting. You need to include
the proper header (date, activity name and partner name) and footer (“from”, page
number, and “to”) on every page.
Note – A participation mark out of 8 is included in this calculation. This is for being present for the entire
activity to participate with your group/partners. Not being there is unfair to other group members and
increases their workload with respect to the activity.
2012-Oct-16
69
Louise Robinson, M.Eng., M.Ed.
Electrical Engineering Technologies
Industrial Electronics Department
Instrumentation & Automation
LOGBOOK – MARKS AND COMMENTS
Name:
Name
Date: 2012-Nov-27
Activity
A8
A9
A10
Procedure
1
1
1
Schematic
1
1
1
Data Sketch
2
Equations
1
1
1
Calculations
2
2
1
Table/Data
1.5
1.5
1.5
Explanations & Summary
2
2
1.5
Formatting & Neatness
1.5
1.5
1
Total
Activity
Mark
LA8
+8
LA9
+8
LA10
+8
Total
/54
Comments
Name,
Note – A participation mark out of 8 is included in this calculation. This is for being present for the entire
activity to participate with your group/partners. Not being there is unfair to other group members and
increases their workload with respect to the activity.
2012-Dec-02
70
Louise Robinson, M.Eng., M.Ed.
Electrical Engineering Technologies
Industrial Electronics Department
Instrumentation & Automation
Lab Report Evaluation Guidelines – Building Bridges
Section:
%
Lab Participation for this Activity: Attendance to the lab class dedicated to this activity and
completion of the activity – provided a report is handed in – otherwise report mark is 0 (zero) (-2% for
every 15 minutes late to lab class – professionalism – team work deduction) .
30
Title Page & Header/Footer: Use standard samples found in LEA
Objectives: Statement of Objectives (paragraph form – in your own words – paraphrase)
Equipment List: List of equipment used for the activity – be specific
Summary of Procedure: Short detailed descriptive summary of the procedure –
summarise it in your own words. Should be written as a numbered list of steps. Ensure that
proper English is used and the statements are very exact and clear.
5
General Explanations and Terminology: Research and find where you would find a
Wheatstone bridge in common use. Include details and cite all your sources in a Bibliography.
Diagrams: If you have not been taught any circuit drawing applications you are expected to
submit your neat and legible hand drawings separately on the due date:
- Figure 1: The complete initial Wheatstone bridge circuit with no meters.
- Figure 2: The Bridge circuit with a voltmeter measuring Vab - indicate polarity.
Data and Tables: Include a completed copy of your data, using tables where appropriate.
Use the table application in Microsoft Word to draw and complete your tables. Center the
table between the page margins and the data in the tables (or align a decimal if you know
how).
5
5
10
5
15
10
Sample Calculations: Using equation editor include sample calculations for the circuit. If
you are not familiar with the application – ask your teacher about it.
10
Conclusion: (paragraph form – not point form)
- Tell what you learned from the exercise
- Were results what you expected? Why? Or Why not?
- Problems encountered?
- Any other information you consider relevant.
Remember to relate the conclusion to the objective of the lab.
10
Excellent: 8 to 10
Acceptable: 6 to 7
Unacceptable 0 to 5
Bibliography
5
Grammar & Spelling (use the spelling and grammar check provided with Word!!!)
Copying: Mark will be zero (0) if any part of this report is copied from or shared with
another student. A letter will also be placed in your College file. See Cheating & Plagiarism
Policy.
Final Total
110
Report Mark
8%
th
Due Date:
Tuesday, November 27 , 2012
Double space report!!
2012-Nov-10
71
Louise Robinson, M.Eng., M.Ed.
Mrk
Wheatstone Bridge Lab Report
Course Name: Industrial Manufacturing
Course Number: 243-142-VA
Prepared By: xxxxxx
Partners: xxxxxxx
Activity Date: 2012-Nov-06
Date Submitted: 2012-Nov-27
Submitted To: Louise Robinson
Electrical Engineering Technologies
Industrial Electronics Department
Instrumentation & Automation
Objectives
To determine the properties of a Wheatstone Bridge circuit using prior knowledge of
series and parallel circuits. The fundamental principles of Ohm’s law and Kirchhoff’s laws
will be tested through their further experience in this particular application.
Equipment List

1x Power Supply

1x Ammeter (DMM)

1x Voltmeter (DMM)

9x Banana Plug Wires

1x 50 Ω Resistor

1x 75 Ω Resistor

1x 100 Ω Resistor

1x 5 kΩ Resistor

1x 10 kΩ Resistor
Summary of Procedure
1. Gather necessary materials
2. Turn on the bench’s power
2012-Nov-27
73
Namexxxxxx
Electrical Engineering Technologies
Industrial Electronics Department
Instrumentation & Automation
3. Set the power supply to 10 volts
4. Using banana plug wires, connect the circuit as illustrated in Figure 1.0
5. Place the voltmeter across each resistor in the circuit to measure potential difference
6. Use the voltmeter to measure potential difference across VAB as shown in Figure 1.1
7. Given ample time, measure all currents throughout the circuit using the ammeter
8. Disassemble circuit and all materials to their place
General Explanations and Terminology
The Wheatstone Bridge circuit is the profuse way of either determining the value of an
unknown resistor’s resistance based on other known value resistors, or inspecting minor
variance with the total resistance. This is often done by using a variable resistor to make the
total equivalent resistance zero, and using that balance to determine the value of the
unknown resistor or see if the measurement varies. In terms of how this can be used, typical
applications include a strain gauge and signal conditioning, which approximately function
to the former effect or with modifications.
2012-Nov-27
74
Namexxxxxx
Electrical Engineering Technologies
Industrial Electronics Department
Instrumentation & Automation
Diagrams
R1=50
R2
75k
R4
5k
+
VA
E=10V
VB
-
R5
10k
R3
100
Figure 1.0 Wheatstone Bridge Circuit
R1=50
R2
75k
R4
5k
+
+
V
VA
E=10V
VB
-
R5
10k
R3
100
1.1 Wheatstone Bridge Circuit w/Voltmeter
Data andFigure
Tables
Vin
2012-Nov-27
Experimental
10V
Theoretical
10V
75
Namexxxxxx
Electrical Engineering Technologies
Industrial Electronics Department
Instrumentation & Automation
V1
V2
V3
V4
V5
VA
VB
I1
I2
I3
I4
I5
RT
VAB
2012-Nov-27
2.25V
3.38V
4.41V
2.67V
5.08V
2.24V
3.32V
4.43V
2.59V
5.17V
4.43V
5.17V
44.8mA
44.3mA
44.3mA
517μA
517μA
223Ω
-739mV
42.5mA
224Ω
-677mV
76
Namexxxxxx
Electrical Engineering Technologies
Industrial Electronics Department
Instrumentation & Automation
Sample Calculations
Conclusion
This experiment is a good demonstration of series-parallel circuits and the way
resistance, voltage and current act throughout them. It also uses the well-known
Wheatstone Bridge to tie those principles in with real-world applications. Problems
encountered include sources of error of which non-steady multimeter readings are the most
significant. According to the results, there is little difference between measured and
theoretical values, proving the data to be accurate. Due to time constraints, not all currents
could be measured, however the one measurement obtained fit within a reasonable margin
to the theoretical value at that point.
Bibliography
- http://terpconnect.umd.edu/~toh/ElectroSim/Wheatstone.html
- http://www.nasa.gov/centers/dryden/pdf/88331main_H-1991.pdf
2012-Nov-27
77
Namexxxxxx
Electrical Engineering Technologies
Industrial Electronics Department
Instrumentation & Automation
2012-Nov-27
78
Namexxxxxx
Electrical Engineering Technologies
Industrial Electronics Department
Instrumentation & Automation
Lab Report Evaluation Guidelines – Building Bridges
Section:
%
Mrk
completion of the activity – provided a report is handed in – otherwise report mark is 0 (zero) (-2% for
every 15 minutes late to lab class – professionalism – team work deduction) .
30
30
Title Page & Header/Footer: Use standard samples found in LEA
Objectives: Statement of Objectives (paragraph form – in your own words – paraphrase)
Equipment List: List of equipment used for the activity – be specific
Summary of Procedure: Short detailed descriptive summary of the procedure –
summarise it in your own words. Should be written as a numbered list of steps. Ensure that
proper English is used and the statements are very exact and clear.
5
5
5
5
3
4
10
10
5
4.5
15
14
10
8
Sample Calculations: Using equation editor include sample calculations for the circuit. If
you are not familiar with the application – ask your teacher about it.
10
8
Conclusion: (paragraph form – not point form)
- Tell what you learned from the exercise
- Were results what you expected? Why? Or Why not?
- Problems encountered?
- Any other information you consider relevant.
Remember to relate the conclusion to the objective of the lab.
10
7.5
5
5
Final Total
110
Report Mark
8%
99
7.20
Lab Participation for this Activity: Attendance to the lab class dedicated to this activity and
General Explanations and Terminology: Research and find where you would find a
Wheatstone bridge in common use. Include details and cite all your sources in a Bibliography.
Diagrams: If you have not been taught any circuit drawing applications you are expected to
submit your neat and legible hand drawings separately on the due date:
- Figure 1: The complete initial Wheatstone bridge circuit with no meters.
- Figure 2: The Bridge circuit with a voltmeter measuring Vab - indicate polarity.
Data and Tables: Include a completed copy of your data, using tables where appropriate.
Use the table application in Microsoft Word to draw and complete your tables. Center the
table between the page margins and the data in the tables (or align a decimal if you know
how).
Excellent: 8 to 10
Acceptable: 6 to 7
Unacceptable 0 to 5
Bibliography
Copying: Mark will be zero (0) if any part of this report is copied from or shared with
another student. A letter will also be placed in your College file. See Cheating & Plagiarism
Policy.
XXXXX, overall an excellent lab report.
You do need to be aware that in an objective all you state are the activity’s objectives. You do not
discuss how you reached your objectives – you only state what the objectives are. When listing the
equipment make sure to be specific. Include details on make and model of all equipment used.
Make sure you pay attention to details in diagrams. The connection dots are becoming standard.
When writing equations, make sure they are full size, not miniatures. This makes it easier to read
them.
2012-Nov-27
79
Namexxxxxx