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Question

Beats are produced by two waves given by y1=asin2000πt and y2=asin2008πt. The number of beats heard per second is

A
two
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B
One
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C
Four
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D
Eight
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Solution

The correct option is C Four
Number of beats per second =n1n2
ω1=2000π=2πn1
n1=1000 and ω2=2008π=2πn2
n2=1004
Number of beats heard per second =10041000=4.

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