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MHT CET Physics question

PhysicsWavesMHT CET

The frequency of vibrating air column in a pipe, open at both ends is 'f'. When (3/4)th of its length is immersed in water, the frequency of vibrating air column is 'f'. The value of is [MHT-CET 2020]

Answer: (B)

Solution

Open pipe ; after immersion the air column is and closed at one end, so

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Question ID VK-070599