Sound – Online MCQs – Physics 10th

1. Loudness depends upon:

2. The loudness and amplitude of sound vary:

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

4. Humidity increases, the density of the air _______ and sound travels _________.

5. Main sources of noise pollution are:

6. A safe level of noise depends on

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

8. Bats can hear frequencies up to:

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

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

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

12. The speed of sound varies with

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

14. It is extensively used in marine applications.

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

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

17. The order of speed of the sound in different mediums from faster to slowest is:

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

19. Ultrasound has several uses in medicine and industry. Which one has the use of ultrasound?

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