An open organ pipe of length L vibrates in its fundamental mode. The pressure variation �8 maximum A. at the two ends B. at the middle of the pipe C. at distances L/4 inside the ends D. at distances L/8 inside the ends

Question

Philoid · Accepted Answer

The fundamental mode of vibration is the minimum frequency at which a standing wave is formed in the pipe. For an open organ pipe, if the fundamental mode of vibration is set up, pressure nodes are found at the open ends because the air molecules at these ends are free to vibrate. It results in the formation of pressure antinodes at the midway between these twos nodes i.e. at the middle of the pipe and here the pressure variation is maximum. Hence option B is correct.

An open organ pipe of length L vibrates in its fundamental mode. The pressure variation �8 maximumA. at the two endsB. at the middle of the pipeC. at distances L/4 inside the endsD. at distances L/8 inside the ends

An open organ pipe of length L vibrates in its fundamental mode. The pressure variation �8 maximum
A. at the two ends

B. at the middle of the pipe

C. at distances L/4 inside the ends

D. at distances L/8 inside the ends