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JAMB Physics 1991 Question 16

Question 16

Thermal Expansion

A brass rod is 2 m long at a certain temperature. What is the length for a temperature rise of 100 K, if the expansivity of brass is 18 × 10−6 K−1?

  1. A.2.0036 m
  2. B.2.0018 m
  3. C.2.1800 m
  4. D.2.0360 m
Show the answer and explanation

Answer: A (2.0036 m)

Explanation

Increase = 2 × 18 × 10−6 × 100 = 0.0036 m, giving 2.0036 m.