(e tect rr." l)
Pûytô,cs
I
)
fn
flgn."
17.1,
.3 FLnat
RevLeat
(e tect rr." l)
force on the
Q = 6.7 nC and all other quantities are exact. \4/hat is the magnitude of the electrical
charge Q?
FiguLre17.1.
a
I cm¡"
ì t Cfll
6ü"
2::C
A)
1,.2
'
10-3 N
{em
3aC
D) 1.0 ' 10-3 N
C) 1.4 x 10-3 N
B) 2.1 x 10-3 N
spherical conductor with radius 2.0 mm carries a charge of 7.0 ¡ß. \Alhat is the electrical field strength at
6.0 mm from the center of the conductor?
2)A
A) 780 x 109 N/c
B) 88 x 109
N/C
C) 1.7 x 109
N/c
D) 25 x 109 N/C
+6.00 ¡rC
+6 00 ¿C
2.00 m
+E.tû
¡rC
2'0t
m
+6.00 ¿C
3) Four equal point
charges of magnitude 6.00 ¡,rC are placed at the corners of a square 2.00 m on each side, as
shown in Figure 20-4. \Alhat is the electric potential of these charges at the center of this square?
A) 61.0 kV
B) 306 kV
C) 1s3
l
kV
D) 38.2
kV
E) 76.4kV
Three capacitors of equal capacitance are arranged as shown in Figure 18.9. The voltage drop across C1 is
{)
10.0 V. What is the voltage drop across C3?
Figure 18.9
C1
C3
C.2
A
wire is connected to a 1.5 V battery, and a current of 8.0 mA flows through it. What is
the diameter of the wire? (The resistivity of metal [s2.24x 10-8 O . -.)
5)
1.0 m length of metal
1\24¡m
4.0
x
B) 2.2
C) 6.0
D) 12 ¡m
¡m
a speed of 2.0 x 105 m/s falls
A)210V
7)'
pm
through a potential difference V and thereby increases its speed to
105 m/s. Through what potential difference did the proton fall?
6) A proton with
B)
100V
C)
840V
D)
630V
E) 1000V
A paralel-plate capacitor consists of two parallef square plates that have dimensions 1.0 cm by 1.0 cm. If the
plates are separated by 1.0 mm, and the space between them is filled with teflon, what is the capacitance? (The
dielectric constant for teflon is 2.1.)
A)
8)
D) 40V
c) 10.0v
B) 30V
A) 20V
1.9
pF
B) 2.1
pF
C)
r-"
O.aa
pF
D) 0.88 pF
point cJrarges of +5.00 pC and +8.00 ¡rC are placed inside a cube of edge length 0.100 m. The net electric
flux due to these charges is given by
A) 3.S0 x 106 Nm2/C
B) 0.450 x 106 Nm2/C
C) 0.340 x 196
¡¡12¡q
D) 7.47 x 106 Nm2/C
E) 4.20 x 106 Nm2/C
Z
Figure 19.15
lEo
o
?) t" Figure 19.15, the current
A) 4.5
fO)
A
of the circuit in the 8 ohm resistor is 0.54. \¡Vhat is the current in the 2 ohm resistor?
B) e.5
A
C) 6.4 A
D) 2.25
A
E) 0.75
A
Each of the resistors in the circuit shown in Figure 19.1 has a resistance of 180.0 C). \Ä/hat is the equivalent
resistance of the circuit?
Figure
A)
!l) A device
c)
B) 4s0.0 c)
180.0 C)
19.1
540.0 c)
D)720.04
experiences a voltage drop of 5.0 V across it while a current of 10.0 mA flows through it. How much
power does it dissipate?
A) s00
pW
B) 50
mW
C)
2.5kW
12) e,Z.O C) resistor is connected across the terminals of a 10.0 V battery.
D) 0.50 kW
If 0.50 A of current flows, what is the
intemal resistance of the battery?
A) 20 O
B) 13
O
C) 27.0
3
O
D) -10.8
C)
Figure 19.16
ft
f¡
4fi
12Y
13) tn figure19.1.6, what is the power dissipated in the 2 ohm resistance in the circuit?
A) 6.67 W
B) 5.33
W
C) 3.s6
Figure
tr)
60v
W
8.0
W
E) 2.67 W
1,9.1,8a
,#*f_
0.10
D)
20 FF
Mo
Initially, for the circuit shown, the switch S is open and the capacitor is uncharged.The switch S is closed at time
t = 0. In Figure 19.18a, when the time t is equal to 8.0 s, the charge on the capacitor, io FC, is closest to:
A)
1200
B)
1e00
c)
1400
4
D)
e40
E) 1600
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