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String Open at One End

It is desired...

Question

It is desired to increase the fundamental resonance frequency in a tube which is closed at one end. This can be achieved by

A

Replacing the air in the tube by hydrogen gas

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B

Increasing the length of the tube

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C

Decreasing the length of the tube

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D

Opening the closed end of the tube

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Solution

The correct options are
A
Replacing the air in the tube by hydrogen gas

C
Decreasing the length of the tube

D
Opening the closed end of the tube

Fundamental frequency pf closed pipe $n = \frac{v}{4 l}$

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