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MHT CET 2022 Physics question

PhysicsWavesMHT CET 2022

On closing an open organ pipe from one end, it is noticed that the frequency of third harmonic is 50 Hz more than fundamental frequency of vibration in open organ pipe. The fundamental frequency of open organ pipe is

Answer: (A)

Solution

For an open pipe of length the fundamental frequency is . After closing one end, the pipe supports odd harmonics only and the third harmonic has frequency . Given $

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Question ID VK-095878