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Two sound waves are superimposed. The re...

Two sound waves are superimposed. The resulting pressure variation at a single point at a distance 'x' from the source is graphed below :
The beat frequency of the resulting sound wave is :

A

10 Hz

B

20 Hz

C

5 Hz

D

40 Hz

Text Solution

Verified by Experts

The period of beats is the time between maximum intensities.The square of the pressure is proportional to the intensity.
Beat frequency =`1/"Beat period"=1/0.1=10 Hz`
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