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Question

Two tuning forks A, B vibrate with frequencies in the ratio 2 : 7 and their wavelength in the ratio 3 : 4 respectively. Find the tuning fork producing greater velocity of sound.

A
Tuning fork A
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B
Tuning fork B
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C
Both (A) and (B)
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D
Cannot be determined
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Solution

The correct option is D Tuning fork B
We know that, v=uλ, where v is the speed of sound wave, u is the frequency.

Now

Let, vA and vB are the speed of tuning fork A and B.

then, vA/vB=uA/uBλA/λB

We get, vA/vB=6/28

Therefor, we get vB>vA

Hence, Velocity of Sound is greater in Fork B


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