NEET Physics Question - Waves - Sound Wave and its Characteristics

Assertion (A): Sound is produced due to vibratory motion, but a vibrating pendulum does not produce audible sound.

Reason (R): A vibrating source always produce audible sound.

(1) Both (A) & (R) are true and the (R) is the correct explanation of the (A)

(2) Both (A) & (R) are true but the (R) is not the correct explanation of the (A)

(3) (A) is true but (R) is false

(4) Both (A) and (R) are false

Solution:

Sound is produced by vibrations. A vibrating pendulum's frequency is typically below the audible range (infrasound), so it does not produce audible sound. Thus, Assertion (A) is true.

Reason (R) is false because a vibrating source must have a frequency within 20 Hz to 20 kHz to produce audible sound.

Rankers Physics

Sound Production

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