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Three sound waves of equal amplitudes have frequencies `(v - 1), v, (v + 1)`. They superpose to give beats. The number of beats produced per second will be :
A. n
B. `n//2`
C. 2
D. 1

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Correct Answer - D
Beat frequency is the difference between the successive frequencies i.e. `(n + 1) - n = 1`

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