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A chord attached about an end to a vibra...

A chord attached about an end to a vibrating fork divides it into 6 loops when its tension is 36 N. The tension at which it will vibrate 4 loops is:

A

` 24 N`

B

`36 N`

C

`64 N`

D

`81 N`

Text Solution

Verified by Experts

The correct Answer is:
D
`f = (p)/( 2 L) sqrt((T)/(mu))`
`rArr p_(1) sqrt(T_(1)) = p_(2) sqrt(T_(2))`
`rArr 6 sqrt(36) = 4 sqrt(T_(2)) rArr T_(2) = 81 N`
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