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Unit 13: Sound — Mcqs

10th Class Physics · Unit 13: Sound

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1.What is required for the production of sound?

2.An echo is produced due to:

3.An example of a longitudinal wave is:

4.In which medium does sound travel the fastest?

5.What is the approximate speed of sound in air?

6.Why is acoustic protection important in building design?

7.For a normal person, the audible frequency range for sound waves lies between:

1.Sound is produced by:

2.Sound waves are classified as:

3.To travel from one place to another, sound requires:

4.The experiment that demonstrates sound cannot travel in a vacuum uses a:

5.In which medium does sound travel the fastest?

6.The approximate speed of sound in air at room temperature is:

7.The formula relating speed (v), frequency (f), and wavelength (λ) of a sound wave is:

8.Which factor does NOT affect the speed of sound in air?

9.The characteristic of sound that distinguishes a loud sound from a faint one is:

10.The loudness of sound depends on the:

11.A sound with a high frequency is perceived as having a:

12.The unique quality of sound that allows us to distinguish between a violin and a flute playing the same note is called:

13.An echo is caused by the __________ of sound waves.

14.For a distinct echo to be heard, the reflecting surface must be at least __________ away from the source.

15.Bats use echoes to navigate and hunt. This process is known as:

16.The range of frequencies audible to a normal human ear is:

17.Sound waves with a frequency above 20,000 Hz are called:

18.Which animal is known to use infrasound for long-distance communication?

19.In medical imaging, ultrasound is used for:

20.The bending of sound waves when they pass from one medium to another is called:

21.Sound waves can bend around obstacles. This phenomenon is known as:

22.On a cool morning, sound seems to travel farther because of:

23.In auditorium design, soft and porous materials are used to:

24.The repeated reflection of sound that persists in a hall is called:

25.Curved ceilings in concert halls are often used to: