Q.

In a resonance-column experiment to measure the velocity of sound, the first resonance is obtained at a length l1  and the sound resonance at a length l2 , (end correction is taken into consideration), then -

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a

l2>3l1

b

May be any of the above depending on the frequency of the tuning fork used

c

l2<3l1

d

l2=3l1

answer is A.

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Detailed Solution

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l1+e=λ4

l2+e=3λ4

l2+e=3(l1+e)

l2=3l1+2e

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