Three sound waves of equal amplitudes ha...

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

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The correct Answer is:

`(n-1)` and `(n+1)` are supposed to form frequency n and n will be at resonance
`n - 1` and `nrarr` produce 1 beat
`n + 1` and `nrarr` produce 1 beat
Number of beats formed are .2..
Aliter:
Maximum number of beats formed `(n + 1) - (n - 1) = 2`.

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