Physics Mock Test series - 8

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1. 
The unidirectional property of a p-n junction is useful for its application as a-

2. 
A gas-filled balloon bursts more easily with a needle than with a nail because-

3. 
Particles that can be added to the nucleus of an atom without altering its chemical properties are-

4. 
If the intensity ratio of two waves is 25:9, the ratio of their amplitudes is-

5. 
The cooling system (radiator) in a motor car works on the principle of-

6. 
Planet A has double the radius of Planet B, and its mass is four times greater than Planet B. Which of the following statements about the weight of an object on these planets is correct?

7. 
Clouds float in the atmosphere due to their low-

8. 
A semiconductor device is connected in series with a battery and a resistor. Current flows through the circuit, but when the battery's polarity is reversed, the current drops to zero. What could the device be?

9. 
When a person stands on feet, the pressure on the surface is 'p'. What will be the pressure when the person stands on just one foot?

10. 
A lens becomes invisible when immersed in a liquid if-

11. 
Fat can be separated from milk in a cream separator due to-

12. 
A liquid drop tends to assume a spherical shape because of-

13. 
A transformer operates with-

14. 
Parsec is the unit of-

15. 
A geostationary satellite should be launched in such a way that it moves from-

16. 
Ampere is the unit of-

17. 
A superconductor has a conductivity that is-

18. 
Which type of lens is used in movie projectors?

19. 
A stationary wave is formed by-

20. 
Why does a person experience a strong shock when accidentally touching a live wire carrying 220V?

21. 
How many images will a man see if he stands between two plane mirrors inclined at an angle of 60°?

22. 
When cathode rays enter an electric field perpendicular to the lines of force, their path becomes-

23. 
The value of which of the following quantity remains the same in all systems of units?

24. 
A girl is swinging on a swing while sitting. How will the time period of the swing change if she stands up?

25. 
A real gas can be liquefied by applying pressure when its temperature is-

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