1.

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. 2C. 1D. `3n`

Answer» Correct Answer - C
`underset(1hz)(f_(1))underset(2hz)(f_(2))underset(3hz)(f_(3))`
`t=0 0 0`
`t=1 sec. 1//2 sec. 1//3 sec. T=1 sec. `
`f=1hz. Ans. (C )`


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