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Thermal Expansion

At some tempe...

Question

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

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B

Both block and pin are heated together

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C

Both block and pin are cooled together

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D

Only the pin is cooled

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Solution

The correct option is A
Only the block is heated

Since coefficient of expansion of steel is greater than that of bronze. Hence with small increase in it's temperature the hole expand sufficiently.

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