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Questions  

A sonometer wire vibrates with a frequency n. It is replaced by another wire of three times the diameter. If tension and other parameters remain the same, the frequency of vibration of the wire will be

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a
9 n
b
3 n
c
m/3
d
n/9

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detailed solution

Correct option is C

n∝1D where D= diameter  n1∝1D  and  n2∝13D ∴ n2n1=13  or  n2=n13=n3

ctaimg

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