Fundamental frequency of stationary waves in open pipe is ______________ times the frequency in closed pipe?
Correct answer: B. Two
- A. One
- B. Two
- C. Four time
- D. None of these
Explanation
For pipes of the same length, the fundamental wavelength of an open pipe is 2L, while that of a closed pipe is 4L. Since frequency equals wave speed divided by wavelength, the open-pipe fundamental is twice the closed-pipe fundamental. The likely mistake is choosing one because both pipes are being compared at the same length.
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About Organ Pipes
Organ pipes produce standing sound waves in air columns, with resonance determined by whether each end is open or closed. The topic covers nodes, antinodes, fundamental frequency, harmonics, wavelength and end correction. Open pipes support all harmonics, while closed pipes support only odd harmonics under the ideal model.
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