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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 ?

A

`250 :313`

B

`5:3`

C

`125:124`

D

`41:57`

Text Solution

Verified by Experts

The correct Answer is:
C
`n propto 1/l n/(n - 2) = l_(2)/l_(1) :. (250)/(148) = 125/124 = l_(2)/l_(1)`
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MARVEL PUBLICATION-STATIONARY WAVES-MULTIPLE CHOICE QUESTIONS ( STANDARD LEVEL )
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