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Q.

The length of a sonometer wire tuned to a frequency of 250 Hz is 0.60 metre. The frequency of tuning fork with which the vibrating wire will be in tune when the length is made 0.40 metre is

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a

250 Hz

b

375 Hz

c

256 Hz

d

384 Hz

answer is B.

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Detailed Solution

n1l1=n2l2⇒250×0.6=n2×0.4⇒n2=375
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