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JAMB Physics 2008 Question 20

Question 20

Thermal Expansion

During summer, the balance wheel of a clock expands. What effect does this have on the accuracy of the clock?

  1. A.The clock gains time
  2. B.The accuracy of the clock is not affected
  3. C.The clock loses time
  4. D.The clock stops working
Show the answer and explanation

Answer: C (The clock loses time)

Explanation

A larger balance wheel swings more slowly (longer period), so the clock ticks fewer times per hour and loses time.