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Q.

To increase the frequency by 50% ,the tension in the string vibrating on a sonometer has to be increased by

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a

44%

b

33%

c

125%

d

11%

answer is C.

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Detailed Solution

n∝T n1n2=T1T2 100150=T1T2 49=T1T2 ΔTT×100=(94−1)×100 =5004=125%
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