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Questions  

An empty vessel is partially filled with water, then the frequency of vibration of air column in the vessel

a
Remains same
b
Decreases
c
Increases
d
First increases then decreases

detailed solution

Correct option is C

For closed pipe in general  n=v4l(2N−1)⇒n∝1li.e. if length of air column decreases frequency increases.

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A tube of certain diameter and of length 48 cm is open at both ends. Its fundamental frequency of resonance is found to be 320 Hz. The velocity of sound in air is 320 m/s. One end of the tube is now closed, considering the effect of end correction, calculate the lowest frequency of resonance for the tube (in Hz). 


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