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Question

The wavelength of a sound in a medium is 50 cm. If wave velocity is 25 ms1, then what is the time period?

A
0.02 s
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B
0.04 s
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C
0.06 s
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D
0.03 s
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Solution

The correct option is A 0.02 s
Given:
Wavelength, λ=50 cm=0.5 m
Wave velocity, v=25 ms1

Let frequency be f and time period be T.

Speed of sound in a medium is given by:
v=fλ
f=250.5=50 Hz

Frequency and time period are related as:
T=1f
T=150=0.02 s

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