Sound – Online MCQs – Physics 10th

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

2. Main sources of noise pollution are:

3. To hear g clear echo, the time interval between the produced original sounds and the reflected one must be at least:

4. Loudness depends upon:

5. The loudness and amplitude of sound vary:

6. Sound waves Cannot pass through

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

8. The reflection of sound is called

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

10. Which types of waves cannot travel through a vacuum?

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

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

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

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

15. It is extensively used in marine applications.

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

17. Sounds of frequency higher than 20,000 Hz which are inaudible to the normal human ear are called

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

19. Bats can hear frequencies up to:

20. Sound travels faster in solid as compared to gases because of: