Sound – Online MCQs – Physics 10th

1. A safe level of noise depends on

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

3. As compared to air, the speed of sound in liquids and solids is

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

5. Sound is a form of:

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

7. Loudness depends upon:

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

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

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

11. Bats can hear frequencies up to:

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

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

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

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

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

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

18. Quality of sound that distinguishes between a shrill and q flat sound is called:

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

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