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Beats are produced by two waves given by...

Beats are produced by two waves given by `y_(1)= a sin 2000 pi t` and `y_(2) =a sin 2008 pi t `. The number of beats heard per second is

A

8

B

2

C

4

D

zero

Text Solution

Verified by Experts

The correct Answer is:
C
`omega_(1) = 2000pi, omega_(2) = 208pi`
`2pi n_(1) = 200 pi, 2pin_(2) = 208 pi`
`n_(1) = 100, n_(2) = 104`
`n = n_(2) - n_(1)`
`= 104 - 100 = 4`
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