STANDARDPhysics-Waves
STANDARD Physics Harmonics in Pipes MCQ Question
Type: MCQ-conceptual-Medium-Class 11
In an organ pipe of length L open at both ends, the fundamental mode has a frequency (where v is a speed of sound in air)
A
v/2L and only odd harmonics are present.
B
v/2L and only even harmonics are present.
C
v/2L and all harmonics are present.
D
v/4L and only odd harmonics are present.
Correct Answer
Option C
Detailed Explanation
An organ pipe of length L open at both ends vibrates with frequencies given by vₙ = nv/2L where n = 1, 2, 3, 4, .... The fundamental frequency corresponds to n = 1 and is given by v₁ = v/2L. In an open pipe all harmonics are present.
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