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What harmonic mode of a pipe 20 cm long, closed at one end, is resonantly excited by a source of 1237.5 Hz? (Assume the speed of sound in air to be 330 m/s.)

Options

  1. AFundamental harmonic
  2. B1st harmonic
  3. C2nd harmonic
  4. D3rd harmonic

Correct answer

D. 3rd harmonic

Step-by-step solution

Correct Option is : (D) 3rd harmonic

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