Sound – Online MCQs – Physics 10th

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

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

3. Loudness depends upon:

4. Main sources of noise pollution are:

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

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

7. The speed of sound in air is directly proportional to the square root of the:

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

9. To propagate, sound needs a material medium of:

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

11. Pitch depends upon:

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

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

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

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

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

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

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

19. The loudness and amplitude of sound vary:

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