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Question 31251
JEE Physics · Hard

Sound Waves: Closed Pipe MCQ

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Closed PipeHardQuestion 31251

Question

A closed pipe gives 5th overtone at 1700 Hz. Fundamental frequency is:
  1. A
    340 Hz
  2. B
    170 Hz
  3. C
    1700/9 Hz
  4. D
    1700/11 Hz
    Correct

Correct answer

1700/11 Hz

Explanation

Closed pipe: overtones are odd harmonics. 5th overtone = 11th harmonic (harmonics 1,3,5,7,9,11 — 5th overtone is n=11). f₁₁ = 11×f₁ = 1700 → f₁ ≈ 154.5 Hz.

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