A pipe open at both ends has a fundamental frequency $f$ in air. The pipe is dipped vertically in water so that half of it is in water. The fundamental frequency of the air column is now:
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Answer:
B
Solution:

$f = \frac{v}{2 l}$

$f^{'} = \frac{v}{4 l^{'}} = \frac{v}{4 (\frac{l}{2})} = f$

Question

A pipe open at both ends has a fundamental frequency f in air. The pipe is dipped vertically in water so that half of it is in water. The fundamental frequency of the air column is now:

TestHub · Accepted Answer

f = v 2 l f ′ = v 4 l ′ = v 4 l 2 = f

Physics - Sound Wave Question with Solution | TestHub

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