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 B49 ν=n2l√Tm=n2×0.5√4000.01=200n The person can hear only if ν<10000 Hz. ⇒200n<10000⇒n<50