Physics Set 5 FAQs

1. The black patch at the centre of the drum head of a tabla is called:

2. The net change in position of an object between two given instants is called its:

3. For an ideal gas at constant pressure, the coefficient of volume expansion is:

4. The two main organs in the human body where the magnetic field produced is significant are the:

5. The North Atlantic Drift is an extension of the:

6. Consider the following pairs: (I) Ārdrā – Betelgeuse (II) Kṛittikā – Pleiades (III) Rohiṇī – Sirius Which of the pairs given above is/are correctly matched?

7. The coefficient of area expansion of a rectangular sheet is:

8. The atmosphere holds about what fraction of the total global carbon?

9. The SI unit of thermal conductivity is:

10. The latent heat of vaporisation of water is:

11. In the Northern Hemisphere, the longest day occurs around:

12. Consider the following statements: (I) A change of units changes the number of significant figures in a measurement. (II) The location of the decimal point has no bearing on the number of significant figures. (III) In scientific notation, all zeros in the base number are significant. Which of the above is/are correct?

13. In the sign convention for lenses, the focal length of a convex lens is ___ and that of a concave lens is ___.

14. A spherical mirror whose reflecting surface is curved inwards is called a:

15. The SI unit of electric charge is:

16. Refraction of light is due to a change in the:

17. Two forces of 12 N and 5 N act on a block in opposite directions along the same line. The magnitude of the net force is:

18. Carbon, with electronic configuration 2, 4, attains an octet by:

19. 0.20 kg of water at 20 °C is mixed with 0.30 kg of water at 60 °C in an isolated container. The final temperature is:

20. Thunder is heard 8 s after a lightning flash. If the speed of sound in air is 340 m s⁻¹, the distance of the lightning strike is approximately:

21. The magnetic effect can act through:

22. Consider the following statements about the two forces in Newton's third law: (I) They act on different objects. (II) They are equal in magnitude and opposite in direction. (III) They cancel each other because they act simultaneously. Which of the above is/are correct?

23. The electronic configuration of an element with atomic number 14 is:

24. Under clear sky conditions, the maximum insolation reaching the Earth's surface is about:

25. The energy stored in fuels and food in the form of bonds between atoms is:

26. Assertion (A): A freely suspended magnet rests along the north–south direction. Reason (R): The Earth itself behaves like a giant magnet. Choose the correct statement:

27. Sound travels fastest in:

28. Consider the following statements about Bohr's model: (I) Electrons revolve only in allowed shells. (II) Electrons can exist between two shells. (III) The shells are also called energy levels. Which of the above is/are correct?

29. The phase in which more than half of the illuminated portion of the Moon is seen is called:

30. The brightest star in the night sky is: