Sound – Online MCQs – Physics 10th

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

2. The cause of the echo is:

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

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

5. The loudness and amplitude of sound vary:

6. The speed of sound varies with

7. The reflection of sound is called

8. Bats can hear frequencies up to:

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

10. It is extensively used in marine applications.

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

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

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

14. When the frequency of sound increases, the wavelength and period

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

16. Main sources of noise pollution are:

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

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

19. Sound is a form of:

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