MCQ Reflection of Sound Chapter 11 Class 9 Science

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MCQ’s For All Chapters – Science Class 9th

1. Sound gets reflected from

Question 1 of 20

2. Reflection of sound follows the same laws as

Question 2 of 20

3. The direction of incident sound, reflected sound, and the normal all lie

Question 3 of 20

4. To reflect sound effectively, the obstacle must be

Question 4 of 20

5. Which instrument can demonstrate the reflection of sound?

Question 5 of 20

6. The time for which sound persists in our brain is approximately

Question 6 of 20

7. The sound which we hear after reflection from a distant surface is called

Question 7 of 20

8. For a distinct echo to be heard, the time interval between the original and reflected sound must be at least

Question 8 of 20

9. If the speed of sound in air is 344 m/s, the minimum distance required for hearing a distinct echo is

Question 9 of 20

10. The rolling of thunder is due to

Question 10 of 20

11. The persistence of sound due to repeated reflection is called

Question 11 of 20

12. Excessive reverberation in halls is

Question 12 of 20

13. Reverberation in auditoriums is reduced by using

Question 13 of 20

14. Materials like compressed fibreboard and draperies are used in halls because they

Question 14 of 20

15. The distance of a reflecting surface from the source can be found using

Question 15 of 20

16. In the megaphone, sound is made to travel

Question 16 of 20

17. The stethoscope works on the principle of

Question 17 of 20

18. Why are the ceilings of concert halls curved?

Question 18 of 20

19. What is the purpose of a curved sound board behind the stage?

Question 19 of 20

20. Which of the following uses multiple reflections of sound?

Question 20 of 20


 

Comments

  1. Shanta Maharjan says:
    August 12, 2023 at 11:32 am

    very good as for school students

    Reply

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