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A source of wave produces 20 crests and ...

A source of wave produces 20 crests and 20 throughs in 0.2 s. Find the frequency of the wave.

A

200 Hz

B

500 Hz

C

100 Hz

D

300 Hz

Text Solution

Verified by Experts

The correct Answer is:
C
A crest is the maximum value of the wave quantity. So at the source, the wave quantity attains maximum value for 20 times in 0.2 sec. The number of times it becomes maximum in 1 seconds is `(20)/(0.2) = 100` So the frequency is 100 Hz.
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