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MHT CET 2025 (26 Apr, Shift 1) · Organ Pipes & Resonance Tube

Organ Pipes & Resonance Tube question from MHT CET 2025 (26 Apr, Shift 1)

Q37MHT CET 2025 · 26 APR · SHIFT 1Medium

Organ Pipes & Resonance Tube

An air column is of length 17 cm. The ratio of frequencies of 55th overtone if the air column is closed at one end to that open at both ends is (velocity of sound in air =340 ms−1= 340\text{ ms}^{-1})

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Answer: (c)

  1. Closed pipe, 5th overtone (11th harmonic): 11v4L\frac{11v}{4L}.
  2. Open pipe, 5th overtone (6th harmonic): 6v2L=12v4L\frac{6v}{2L} = \frac{12v}{4L}.
  3. Ratio =1112= \frac{11}{12} (independent of LL and vv).
  4. So the answer is (c) 1112\frac{11}{12}.
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