First slide

Thermal expansion

Question

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

Easy

A

should be heated
B

should be cooled
C

may be heated or cooled
D

can not be removed by heating or cooling

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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