Sound – Online MCQs – Physics 10th

1. Sound with frequencies below the lower limit of the human range of audibility is known as:

2. If a wave completes 20 vibrations in 2.5s, then its frequency is:

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

4. Main sources of noise pollution are:

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

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

7. Sound is a form of:

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

9. The reflection of sound is called

10. It is extensively used in marine applications.

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

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

13. A safe level of noise depends on

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

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

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

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

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

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

20. On increasing the temperature, the speed of sound in air: