Open organ pipe when filled with water partially then its fundamental frequency
A
Increases
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B
Decreases
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C
Remain same
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D
Either a or b
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Solution
The correct option is A Increases The fundamental frequency of open organ pipe is ν=v2l where v is the velocity of sound and l is the length of organ pipe. Velocity of sound depends on the medium. If medium is liquid then the velocity of sound increases and hence frequency increase.