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JAMB Physics 1987 Question 17

Question 17

Thermal Expansion

A metallic strip of iron and brass was heated. Which of the following diagrams accurately illustrates the shape of the strip after heating?

Diagram for this question
  1. A.A
  2. B.B
  3. C.C
  4. D.D
Show the answer and explanation

Answer: B (B)

Explanation

Brass expands more than iron, so the strip bends with the brass on the outside (convex) side of the curve, as in B.