There is a rectangular metal plate in which two cavities in the shape of a rectangle and a circle are made, as shown in the figure. $P$ and $Q$ are the centres of these cavities. On heating the plate, which of the following quantities increase?

Question

Source diagram 51

TestHub · Accepted Answer

Uniform expansion scales all lengths by 1 + α Δ T a , b , r , R all increase. Both cavity areas also increase.

Physics - Heat & Thermo Question with Solution | TestHub

Options:(select one or more)

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