Concepts Of Physics MCQ Edition [Volume 2]PhysicsHeat and Temperature

When a metal sheet containing a circular hole is heated, the hole

Options

Abecomes smaller
Bbecomes deformed
Cremains the same size
Dbecomes larger

Correct answer

D. becomes larger

Step-by-step solution

When a metal sheet is heated, it undergoes thermal expansion. The expansion of an isotropic solid is analogous to a photographic enlargement. The distance between any two points on the sheet increases upon heating. Therefore, the diameter of the circular hole also increases, meaning the hole becomes larger.

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