Sound – Online MCQs – Physics 10th

1. The speed of sound varies with

2. The loudness of sound varies directly with the vibrating body:

3. The approximate value of the speed of sound in air at 0°C temperature is:

4. Bats can hear frequencies up to:

5. The two factors that affect the speed of sound in the air are:

6. At a temperature of 20°C, the speed of sound is:

7. If a wave completes 20 vibrations in 2.5s, then its frequency is:

8. Sound waves are produced by:

9. Generally, we classify ultrasound as those having frequencies above:

10. The cause of the echo is:

11. The separation between two consecutive compressions of the sound wave is called:

12. The loudness and amplitude of sound vary:

13. As compared to air, the speed of sound in liquids and solids is

14. The reflection of sound is called

15. The S.I unit sound of intensity is:

16. Loudness depends upon:

17. Main sources of noise pollution are:

18. On increasing the temperature, the speed of sound in air:

19. Sound waves are:

20. On what factor does the quality of sound depend?