+1 Physics MCQ(Chapter 8-15)

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Prepared by Anoop K S,HSST Physics,PMSAMAHSS Chemmankadavu,Malappuram

1. A spherical ball contracts its volume by 0.1%, when subjected to a normal uniform pressure of 100 atm. The bulk modulus of the material of the ball is *

1 point

Option 1

Option 2

Option 3

Option 4

2. The dimensional formula of Young’s modulus is *

1 point

Option 1

Option 2

Option 3

Option 4

3. *

1 point

Option 1

Option 2

Option 3

Option 4

4. *

1 point

Option 1

Option 2

Option 3

Option 4

5. *

1 point

Option 1

Option 2

Option 3

Option 4

6. A hydraulic lift works on the principle of: *

1 point

Bernoulli’s principle

Torricelli’s law

Magnus effect

Pascal’s law

7. In a car lift, compressed air exerts a force on a piston of radius 5 cm. This pressure is transmitted to a wider piston of radius 15 cm. What force must the compressed air exert on the smaller piston to lift a car of weight 1620 kg? (g= 9.8 m/s^2) *

1 point

1470 N

1300 N

1764 N

1884 N

8. *

1 point

Option 1

Option 2

Option 3

Option 4

9. Ramesh is admitted to his nearest Public Health Centre due to high fever. His body temperature is found to be 102°F. This temperature in Celsius scale may be noted as : *

1 point

42.1°C

38.9°C

40.3°C

39.4°C

10. Which of the following is the unit of molar specific heat capacity (C)? *

1 point

Option 1

Option 2

Option 3

Option 4

11.A body cools from 70°C to 60°C in 5 minutes. How much time does it takes to cool from 60°C to 50°C? The temperature of the surroundings is 30°C. *

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9 minutes

8 minutes

5 minutes

7 minutes

12. The method of heat transfer in which heat is transferred from one place to another by the actual movement of the particles is called: *

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Radiation

Convection

Conduction

Diffusion

13. The efficiency (η) of a Carnot engine operating between temperatures 27°C and 327°C is : *

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30 %

40%

50%

60%

14. *

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Isothermal process

Adiabatic process

Isochoric process

Isobaric process

15. A Carnot engine takes 3x10^6 cal. of heat from a reservoir at 627°C and gives out heat to sink 27°C. Work done by the engine is: *

1 point

Option 1

Option 2

Option 3

Option 4

16. During an adiabatic expansion of 2 moles of a gas, the change in internal energy is found to be equal to -100 J. The work done during this process is equal to: *

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Zero

-100 J

200 J

100 J

17. The Root Mean Square velocity of a gas molecule at a temperature T is: *

1 point

Option 1

Option 2

Option 3

Option 4

18. *

1 point

1.67

1.40

1.33

1.28

19. When the absolute temperature of a given sample of gas doubled, its kinetic energy *

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Remains the same

Becomes double

Becomes half

Becomes four times

20. *

1 point

Option 1

Option 2

Option 3

Option 4

21. A simple pendulum of length 1 m executes Simple harmonic motion of amplitude 5 cm. The value of maximum speed is : *

1 point

Option 1

Option 2

Option 3

Option 4

22. *

1 point

y= 0.05 sin (2t +π/4)

y=0.05 sin (4t+π/2)

y=0.1 sin (2t+π/2)

y=0.1 sin (4t+π/4)

23. A train approaching the station blowing its siren. A man standing on the platform observes a change in frequency of the sound produced. This phenomenon is called : *

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Resonance

Damping

Doppler effect

Polarisation

24. The length of air column in resonance column apparatus is 20 cm. Which harmonic mode of the pipe is resonantly excited by a tuning fork of frequency 428 Hz. (Speed of sound in air is 340 m/s) *

1 point

First harmonic

Second harmonic

Third harmonic

Fourth harmonic

25 *

1 point

324 N

648 N

162 N

512 N

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