Q.

A Brass stopper snuggly fits in the hole of steel plate. To remove the stopper easily, the system

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a

should be heated

b

should be cooled

c

may be heated or cooled

d

can not be removed by heating or cooling

answer is B.

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Detailed Solution

Co-efficient of linear expansion of brass is more than that of steel.So if the system is cooled down , decrease in diameter of brass stopper will be more than that of the hole in steel.
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