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Frequency

An empty vess...

Question

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

A

Remains same

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B

Decreases

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C

Increases

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D

First increases then decreases

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Solution

The correct option is C
Increases

For closed pipe in general n = $\frac{v}{4 l} (2 N - 1)$ $\Rightarrow$

n ∝ $\frac{1}{l}$

i.e, if length of air column decreases frequency increases .

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