Sound – Online MCQs – Physics 10th

1. Loudness depends upon:

2. The speed of sound is the same in al! mediums. This statement is:

3. The loudness and amplitude of sound vary:

4. The cause of the echo is:

5. Frequency of infrasonic waves is __________ than the frequency of ultrasound waves.

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

7. Audible frequencies range that a normal human ear can detect is:

8. Sound waves are:

9. The reflection of sound is called

10. The sensation of sound persists in our brain for about

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

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

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

14. For hearing clear echoes, the minimum distance of the obstruction from the source of sound should be:

15. The speed of sound depends on the properties such as:

16. The technique used to locate underwater depths or locating objects lying deep on the ocean floor is called:

17. The unit of quantity on which the pitch of the sound depends is:

18. Sound waves are produced by:

19. The sound with frequencies above the upper limit of the human range of audibility is known as:

20. Over an eight-hour workday, the noise level recommended in most countries is usually: