A hole is made in a metal plate, when the temperature of metal is raised then the diameter of the hole will :-
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A hole is made in a metal plate, when the temperature of metal is raised then the diameter of the hole will :-

G1 Physics · Accepted Answer

Use ΔL=αLΔT, ΔA≈2αAΔT and ΔV≈3αVΔT (or the given cubical coefficient γ). For constrained bodies include the elastic stress needed to cancel free expansion. Evaluating the given data/statements gives B: Increase. Therefore the correct answer is B.