Question

# The sum of number of compressions and rarefactions produced by a sound wave per second is 200. The frequency of sound wave is

A
50
B
100
C
150
D
200

Solution

## The correct option is C 100Frequency is measured as the number of wave cycles that occur in one second. The unit of frequency measurement is Hertz. Given  Sum of compressions and rarefactions = 200 Thus number of cycles = 100  (one compression and rarefaction make a cycle) Thus frequency = 100 HzPhysics

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