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MHT CET 2026 (13 Apr, Shift 1) · Organ Pipes & Resonance Tube

Organ Pipes & Resonance Tube question from MHT CET 2026 (13 Apr, Shift 1)

Q9MHT CET 2026 · 13 APR · SHIFT 1Medium

Organ Pipes & Resonance Tube

In fundamental mode, the time required for the sound wave to reach upto the closed end of a pipe filled with air is tt second. The frequency of vibration of air column is

(λ\lambda = wavelength of the wave)

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Answer: (b)

  1. Fundamental of closed pipe: L=λ4L = \frac{\lambda}{4} and f=v4Lf = \frac{v}{4L}.
  2. Time to travel the pipe length: t=Lvt = \frac{L}{v}.
  3. f=14⋅vL=14t=0.25tf = \frac{1}{4}\cdot\frac{v}{L} = \frac{1}{4t} = \frac{0.25}{t}
  4. So the answer is (b) 0.25t\frac{0.25}{t}.
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