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What tension should be there in a string...

What tension should be there in a string of length 0.8m and of mass `5xx10^(-3) kg`, if it vibrates with fundamental frequency of 100 Hz?

A

100N

B

160N

C

140N

D

120N

Text Solution

Verified by Experts

The correct Answer is:
B
`n=(1)/(2l) sqrt(T/m) therefore n^2 = (1)/(4l^2) T/m`
`therefore T= 4n^2l^2m`
`=(4xx10^(4)xx0.6xx5xx10^(-3))/(0.8) = 160N`
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