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AP EAMCET202423 May 2024Morning ShiftPhysicsWaves and SoundActual

The frequency of fifth harmonic of a closed pipe is equal to the frequency of third harmonic of an open pipe. If the length of the open pipe is 72 cm . then the length of the closed pipe is

Options

  1. A60 cm
  2. B45 cm
  3. C30 cm
  4. D75 cm

Correct answer

A. 60 cm

Step-by-step solution

For open organ pipe, 1_ o =72 ~cm , f = 3 v 2 l₀ For closed organ pipe, f = 5 v 4 l_ c aligned 3 v 2 l₀ & = 5 v 4 l_ c l_ c = 5 l_ o 6 = 5 72 6 & =60 ~cm aligned

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