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The frequency of the note produced by a sonometer wire will be decreased by 10%, if the tension is increased by

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The frequency of the note produced by a sonometer wire will be decreased by 10%, if the tension is increased by
A. 0.1
B. 0.5
C. 1
D. 0.21
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Correct Answer - D
`n_2/n_1 = sqrt(T_2/T_1)`
`(1.1n_1)/(n_1) = sqrt(T_2/T_1)`
`1.21 = T_2/T_1`
`(T_2-T_1)/(T_1) = 1.21 - 1 = 0.21`
`(DeltaT)/(T) = 21%`
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