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Two wires A and B are of same length, redius and same material are in unison. If tendion in A is increassed by 4% 4 beats are heard, then the frequency of the note produced when they ware in unison, will be
A. 50 Hz
B. 100 Hz
C. 150 Hz
D. 200 Hz

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Correct Answer - D
`(104)/(100)=((n+4)/(n))^(2)or sqrt((104)/(100))= (n+4)/nrArrn=200 Hz`

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