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Question

If fundamental frequency of an open pipe is f0. Its fundamental frequency when it is half-filled with water is :

A
f0
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B
λ4
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C
2f0
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D
none of these
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Solution

The correct option is A f0
When the pipe is half filled with water , it becomes a closed pipe with length
l2=λ4
λ=2l
same wavelength existed in open pipe . Therefore , frequency remains unchanged .

154341_139253_ans_0d6a5f77fadf46e08793f4b600aaf594.png

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