At some temperature T, a bronze pin is a little large to fit into a hole drilled in a steel block. The change in temperature…

Q: At some temperature T, a bronze pin is a little large to fit into a hole drilled in a steel block. The change in temperature required for an exact fit is minimum when

(a) Only the block is heated

(b) Both block and pin are heated together

(c) Both block and pin are cooled together

(d) Only the pin is cooled

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Ans: (a) , (b)