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Three sound waves of equal amplitude hav...

Three sound waves of equal amplitude have frequencies (n-1), n, (n + 1). They superimpose to give beats. The number of beats produced per second will be ?

A

2

B

1

C

4

D

3

Text Solution

Verified by Experts

The correct Answer is:
A
`{:(A,B,C),(v-1,v,v+1):}`
Between `A & B 1 b//s 1`
`B & C 1 b//s 1`
`C & A 2 b//s (1)/(2) ((2)/(2))`
`rArr 2 b//s`
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