# MCQ Questions for Class 8 Science Chapter 13 Sound with Answers

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## Q1. Drum produces sound from:

(A) vibrating membrane
(B) vibrating stretched membrane
(C) vibrating strings
(D) none of these

## Q2. Cochlea is a part of

(A) hearing organ
(B) sound producing organ
(C) muscular organ
(D) air pollution

## Q3. The frequency of subsonic sound is

(A) more than 20 Hz
(B) 100 Hz
(C) less than 20 Hz
(D) more than 20,000 Hz

## Q4. Frequency of oscillations is:

(A) the number of oscillations per minute
(B) the number of oscillations per hour
(C) the number of oscillations per second
(D) none of these

## Q5. A shehnai produces sound from:

(A) vibrating strings
(B) vibrating membrane
(C) vibrating air column
(D) none of these

## Q6. 1 hertz is equal to

(A) 1 vibration per minute
(B) 10 vibrations per minute
(C) 60 vibrations per minute
(D) 600 vibrations per minute

(A) frequency
(B) speed
(C) amplitude
(D) loudness

(A) hertz
(B) hertz /sec
(C) hertz / min
(D) hertz / hour

## Q9. Vibration in a body produce:

(A) energy
(B) sound
(C) heat
(D) none of these

(A) air
(B) water
(C) air
(D) vacuum

## Q11. The hearing range of human ear is

(A) 20 Hz to 20,000 Hz
(B) less than 20 Hz
(C) more than 20,000 Hz
(D) 20 Hz to 25,000 Hz

## Q12. The frequency determines the of a sound.

(A) loudness
(B) pitch
(C) both loudness and pitch
(D) none of these

(A) baby girl
(B) baby boy
(C) a man
(D) a woman

## Q14. The sound in the audible range is called

(A) ultrasonic sound
(B) sonic sound
(C) subonic sound
(D) light sound

## Q15. A pendulum oscillates 20 times in 4 seconds. Find its time period.

(A) 0.05 sec.
(B) 0.001 sec.
(C) 0.2 sec.
(D) 0.1 sec

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