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JAMB Physics 2013 Question 28

Question 28

Sound

If a sonometer has a fundamental frequency of 450Hz, what is the frequency of the fifth overtone?

  1. A.2700Hz.
  2. B.456Hz.
  3. C.444Hz.
  4. D.75Hz.
Show the answer and explanation

Answer: A (2700Hz.)

Explanation

A stretched string gives all harmonics; the fifth overtone is the sixth harmonic: 6 × 450 = 2700 Hz.