A sonometer wire of length l(1)is in rea...

A sonometer wire of length `l_(1)`is in reasonance with a frequency 250 Hz. If the length of wire is increasesed then 2 beats per second are heard. What is ratio of the lengths of the wire ?

125:124

250:313

`5:3`

`41:57`

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Verified by Experts

The correct Answer is:

`n_1/n_2 = l_2/l_1`
`250/248 = l_2/l_1`
`125/124 = l_2/l_1`

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