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MHT CET 2026 (13 May, Shift 2) · Organ Pipes & Resonance Tube

Organ Pipes & Resonance Tube question from MHT CET 2026 (13 May, Shift 2)

Q8MHT CET 2026 · 13 MAY · SHIFT 2Medium

Organ Pipes & Resonance Tube

An organ pipe closed at one end has fundamental frequency of 15001500 Hz. The maximum number of overtones generated by this pipe a normal person can hear is (neglect end connection)

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Answer: (c)

  1. Closed pipe gives only odd harmonics: (2n+1)f0(2n+1)f_0, where nn = overtone number.
  2. Audible limit ≈20 kHz\approx 20\text{ kHz}: (2n+1)(1500)≤20000⇒2n+1≤13.3(2n+1)(1500) \le 20000 \Rightarrow 2n+1 \le 13.3
  3. Highest odd harmonic =13= 13, so 2n+1=13⇒n=62n+1 = 13 \Rightarrow n = 6.
  4. So the answer is (c) 66.
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