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I
20 – 03 – 2015
Part – III
PHYSICS, Paper – I
(English version)
Time: 3 hours
Max. Marks: 60
Section – A
Very short answer types questions.
i)
ii)
Answer all questions
Each questions carries two marks
1. What is the contribution of S. Chandra Sekhar to physics? (plus academy guess q’s,
Q.No:3 )
2. Distinguish between accuracy and precision. (plus academy guess q’s, Q.No:10 )
3. Two forces of magnitudes 3 units and 5 units act 600 with each other. What is the
magnitude of their resultant? (plus academy guess q’s, Q.No:36 )
4. When a bullet is fired from a gun, the gun gives a kick in the backward direction
.explain? (plus academy guess q’s, Q.No:39 )
5. What is magnus effect?
Ans: in case of ball moving with spin, the difference in velocities of air results in the
pressure difference between the lower and upper faces and there is a net upward
force on the ball. This dynamic lift due to spinning is called magnus effect.
6. What is the principle behind the carburettor of an automobile?
Ans:The function of carburettor of an automobile is based on Bernoulli’s theorem,
venturimeter. The carburettor of automobile has a venture channel (nozzle) through
which air flows with a large speed. The pressure is the lowered at the narrow neck
and the petrol is sucked up in the chamber to provide the correct mixture of air fuel
necessary for combustion.
7. What is greenhouse effect? Explain global warming? (plus academy guess q’s,
Q.No:103 & 104 )
8. Find the increase in temperature of aluminium rod if its length is to be increased by
1%. [ for aluminium is 25
[Topic – Thermal properties of matter]
0
Ans: 400 C
Junior Intermediate | Physics I IPE 2015 Question paper
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9. Define free path? (plus academy provide TG paper Q. No: 9 )
10. What is the expression between the pressure and kinetic energy of gas molecule?
[Topic – Kinetic Theory]
Section – B
Short answer types questions.
(i) Attempt any Six questions
(ii) Each questions carries four marks
11. When a ball is thrown upwards with a velocity of 20 m/s from the top of a multistorey, the height of the point from where the ball is thrown is 25.0m from the
ground.
a. How high will the ball rise? And
b. How long will it be before the ball hits the ground? (plus academy provide
TG paper Q. no:11 )
12. Show that the trajectory of an object thrown at certain angle with the horizontal is a
parabola. (plus academy guess q’s, Q.No:2 )
13. Explain advantages and disadvantages of friction. (plus academy guess q’s, Q.No:6 )
14. Define vector product. Explain the properties of a vector product with two
examples. (plus academy guess q’s, Q.No:20 )
15. Distinguish between centre of mass and centre of gravity. (plus academy guess
q’s,Q.NO: 21)
16. What is escape velocity? Obtain an expression for it? (plus academy guess q’s,
Q.No:29 )
17. Describe the behaviour of a wire under gradually increasing load. (plus academy
guess q’s, Q.No:33 )
18. Explain conduction, convection and radiation with examples. (plus academy provide
TG paper Q. no:18 )
Section – C
Long answer types questions.
a. Attempt any two questions
b. Each questions carries eight marks
19. State and prove law of conservation of energy in case of freely falling body.
A pump is require to lift 600kg of water per minute from a well 25m deep and eject
it with a speed of 50m/sec. calculate the power required to perform the above
task.(plus academy guess q’s, Q.No:1 )
Junior Intermediate | Physics I IPE 2015 Question paper
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20. Show that the motion of a simple pendulum is simple harmonic and hence derive an
equation for its time period. What is second’s pendulum? What is the length of a
simple pendulum which ticks seconds? (g=9.8 m/sec2) (plus academy guess q’s,
Q.No:3 + (plus academy provide TG paper Q. no:20 ))
21. State second law of thermodynamics. How is heat engine different form a
refrigerator?. (plus academy guess q’s, Q.No:8 )
Plus academy guess paper
2 Marks – scoring
: 12 M
4 Marks – scoring
: 32 M
8 Marks – scoring
: 24 M
Total Scoring (with choice):
68/76 Marks
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Junior Intermediate | Physics I IPE 2015 Question paper
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