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Two sound waves are given by y(1) = A si...

Two sound waves are given by `y_(1) = A sin (1000 pit) and y_(2) = A sin (1008 pi t)`. The number of beast heard per second is

A

8

B

4

C

0

D

2

Text Solution

Verified by Experts

The correct Answer is:
B
`y_(1) = A sin omega t = A sin (2pi n_(1) t) = A sin (100 pi t)`
`:. 2n_(1) = 1000 " " :. n_(1) = 500 Hz`
and `n_(2) = 504 Hz " " :. n_(2) -n_(1) = 4` beats/s
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