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The fundamental frequency of a sonometer...

The fundamental frequency of a sonometer wire increases by 5Hz, if the tension is increased by 21% . The fundamental frequency of the sonometer wire is a Hz is

A

45

B

50

C

100

D

55

Text Solution

Verified by Experts

The correct Answer is:
B
`n_2/n_1 = sqrt(T_2/T_1) = sqrt(121/100) = 1.1`
`(n+5)/(n) = 1.1`
1.1n - n = 5
0.1n = 5
n = 50
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