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JAMB Physics 2008 Question 10

Question 10

Waves

What is the frequency of vibration if the balance wheel of a wrist-watch makes 90 revolutions in 25 s?

  1. A.0.01 Hz
  2. B.0.04 Hz
  3. C.2.27 Hz
  4. D.3.60 Hz
Show the answer and explanation

Answer: D (3.60 Hz)

Explanation

Frequency = number of revolutions ÷ time = 90 ÷ 25 = 3.6 Hz.