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Question

A person can hear frequencies only below 10kHz. A steel piano wire 50cm long of mass 5g is stretched with a tension of 400N. The number of the highest overtone of the sound produced by this piano wire that the person can hear is

A
48
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B
50
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C
49
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D
51
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Solution

The correct option is B 49
ν=n2lTm=n2×0.54000.01=200n
The person can hear only if
ν<10000 Hz.
200n<10000n<50

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