A stretched uniform wire of a sonometer between two fixed knife edg...

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A stretched uniform wire of a sonometer between two fixed knife edges, when vibrates in its second harmonic gives 1 beat per second with a vibrating tuning fork of frequency \( 200 \mathrm{~Hz} \). Find the percentage
\( \mathrm{P} \) change in the tension of the wire to be in unison with the tuning fork.

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