Physics Set 16 FAQs

1. The continuous movement of water upward as water vapour and downward through precipitation is called the:

2. Since the International Astronomical Union redefined the requirements for a planet in 2006, Pluto is classified as a:

3. A lunar year, consisting of 12 lunar months, has about:

4. The number of principal foci of a lens is:

5. In a dry cell, the negative terminal is the:

6. The surface temperature of the Sun, estimated by Wien's law from its wavelength of maximum intensity, is about:

7. If ν is the frequency and T is the time period of a wave, then:

8. The persistence of sound in a large hall after the source stops, caused by multiple reflections, is called:

9. One newton is the force that produces an acceleration of 1 m s⁻² on an object of mass:

10. In the reflection of sound, the directions of the incident and reflected sound make equal angles with the:

11. Resistors of 4 Ω and 12 Ω connected in parallel are joined in series with a 5 Ω resistor across a 16 V battery. The total current in the circuit is:

12. Which of the following is an example of forced convection?

13. A train moving at a speed of 20 m/s covers a distance of 144 km. The time taken is:

14. The equivalent resistance of resistors of 2 Ω, 3 Ω and 5 Ω connected in series is:

15. The speed (v) of a sound wave in terms of its wavelength (λ) and frequency (ν) is:

16. A car travels 150 km north in 2 h and then 150 km south in 3 h. The average speed and the magnitude of average velocity for the whole trip are:

17. The period of the function f(t) = A cos ωt is:

18. A small source producing sound in all directions in an unconfined medium sends out:

19. A girl carries a box while walking horizontally. The work done by the upward force she applies on the box is:

20. The currently accepted value of G is:

21. The limiting speed beyond which steady flow becomes turbulent is called:

22. Consider the following statements: (I) During the day, land gets heated faster than water. (II) A sea breeze blows from the sea to the land during the day. (III) A land breeze blows from the sea to the land at night. Which of the above is/are correct?

23. A fixed object or point with respect to which distance or position is stated is called:

24. The velocity of a bus changes from 18 km h⁻¹ to 36 km h⁻¹ in 4 s. Its average acceleration is:

25. The two sides of the 'U' of a tuning fork are called:

26. The polar regions experience continuous sunshine for about:

27. The angle between the direction of the incident ray and the direction of the emergent ray in a glass prism is called the angle of:

28. The momentum of an object is the product of its:

29. Atoms with the same atomic number but different mass numbers are called:

30. Consider the following statements for motion in a straight line: (I) If the object moves without turning back, distance travelled equals the magnitude of displacement. (II) If the object moves in one direction, average speed equals the magnitude of average velocity. (III) If the object turns back, average speed equals the magnitude of average velocity. Which of the above is/are correct?