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The string of monochord , vibrates 100 t...

The string of monochord , vibrates 100 times a second. Its length is doubled and its tension is altered unitl it makes 150 vib/s . What is the ratio of the new tension to the string increases by a force ?

A

`1:9`

B

`9:1`

C

`1:3`

D

`3:1`

Text Solution

Verified by Experts

The correct Answer is:
B
`T_1/T_1 =(n_2/n_1)^2xx(l_2/l_1)^2 = 2.25xx4 = 9.1`
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