Home Physics Wave and Sound Organ Pipes and Resonance An open organ pipe of length L vibrates in i…
Physics Wave and Sound Organ Pipes and Resonance MCQ (Single Correct)

An open organ pipe of length L vibrates in its fundamental mode. The pressure variation is maximum

A
at the two ends
B
at the middle of the pipe
C
at distance L/4 inside the ends
D
at distance L/8 inside the ends

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The correct answer is:
B

In an open pipe the ends are points of displacement antinodes and hence pressure node. The midpoint (for fundamental mode) is a point of displacement node and hence pressure antinode. (variation of presure is maximum at pressure antinode and zero at pressure - node).

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