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Question

Question: In a resonance-column experiment to measure the velocity of sound, the first resonance is obtained a...

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 –

A

l2> 3l1

B

l2 = 3l1

C

l2< 3l1

D

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

Answer

l2> 3l1

Explanation

Solution

l1 + e = λ4\frac { \lambda } { 4 }

l2 + e = 3λ4\frac { 3 \lambda } { 4 }

l2 + e = 3(l1 + e)

l2 = 3l1 + 2e