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MHT CET Physics question

PhysicsWavesMHT CET

A pipe open at both ends has a fundamental frequency 'n' in air. The pipe is inserted vertically in water so that half of it is air. The fundamental frequency of the air column is now [MHT-CET 2015]

Answer: (D)

Solution

Initially ; the half-length air column is closed at one end, so

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Question ID VK-070643