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A rod of length l and radius r is bent into a ring of radius R with a cut which makes an angle of at the centre. If coefficient of thermal expansion is positive then on heating
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Correct option is B
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There is a rectangular metal plate in which two cavities in the shape of rectangle and circle are made, as shown with dimensions. P and Q are the centres of these cavities. On heating the plate, which of the following quantities increase?
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