Two vibrating tuning forks produce progressive waves given be `y_(1) = 4 sin 500 pi t` and `y_(2) = 2 sin 506 pi t` where t is in seconds number of beats produced per minute is ………..

Options

A. 60
B. 3
C. 369
D. 180

Answer

D

Explanation

`v_(1) = (500pi)/(2pi) = 250` Hz , `v_(2) = (506 pi)/(2pi) = 253` Hz
Number of beats are second = `v_(2) - v_(1) = 3 `Hz
Number of beats are minute = `3 xx 60 = 180` Hz