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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 isA. zeroB. oneC. fourD. eight |
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Answer» Correct Answer - C Number of beats per second `=n_(1)~n_(2)` `omega_(1)=2000pi=2pin_(1)` `implies n_(1)=1000` and ` omega_(2)=2008 pi=2pin_(2)` `implies n_(2)=1004` Number of beats heard per second `=1004-1000=4` |
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