Heat and Thermal ExpansionHard

Question

A meter washer has a hole of diameter d1 and external d2, where d2 = 3d1. On heating, d2 increase by 0.3%. Then d1 will :-

Options

A.decrease by 0.1%
B.decrease by 0.3%
C.increase by 0.1%
D.increase by 0.3 %

Solution

Expansions of a metal is same as photographic enlargement . ⇒ d1 will increase by 0.3%

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