Physics Set 1 FAQs

1. Which of the following is a non-luminous object?

2. The stress set up in a rod whose expansion is prevented by rigid supports is called:

3. The SI unit of molar specific heat capacity is:

4. The potential energy of an object of mass m at a small height h above the Earth's surface is:

5. According to Newton's law of cooling, the rate of loss of heat of a body is directly proportional to the:

6. Dentists use which type of mirror to see large images of the teeth?

7. X-rays were discovered in 1895 by:

8. Consider the following statements about the causes of myopia: (I) Excessive curvature of the eye lens (II) Elongation of the eyeball (III) The eyeball becoming too small Which of the above can cause myopia?

9. The ability of the eye lens to adjust its focal length is called:

10. Excess nitrates from fertilisers cause algal blooms that deplete oxygen and kill fish. This process is called:

11. Consider the following statements about the effects of a force: (I) It can change the speed of a moving object. (II) It can change the shape of an object. (III) It can change the direction of motion of an object. Which of the above is/are correct?

12. The value of the universal gas constant R is:

13. The number of significant figures in 0.00250 m is:

14. Consider the following pairs: (I) Lunar eclipse – Full Moon day (II) Solar eclipse – New Moon day (III) Solar eclipse – Full Moon day Which of the pairs given above is/are correctly matched?

15. Most α-particles passed through the gold foil undeflected, which showed that:

16. The frequency of the AC electric power received in houses is:

17. About 99 per cent of the Sun's energy falls within the:

18. In which of the following is the work done by the force on the object negative?

19. The Pole Star appears nearly stationary in the sky because:

20. Kepler's second law follows from the conservation of:

21. Sound cannot propagate through:

22. A car moving at 20 m s⁻¹ is brought to rest with a constant acceleration of −5 m s⁻². The distance travelled before stopping is:

23. The most common type of rechargeable battery found in almost all devices that use batteries is the:

24. A temperature of 50 °C is equal to:

25. Planets discovered revolving around other stars in our galaxy are called:

26. A pressure equivalent of 1 mm of mercury is called:

27. A car starts from rest and its velocity increases uniformly to 12 m s⁻¹ in 6 s. The displacement in these 6 s is:

28. One kilowatt hour is equal to:

29. The potential energy of a particle in SHM at displacement x is:

30. The refractive index of a medium is 1.25. The speed of light in the medium (speed of light in vacuum = 3 × 10⁸ m s⁻¹) is: