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Thermal Expansion

The brass dis...

Question

The brass disc fits tightly in a hole in a steel plate. To loose the disc from hole

A

We should cool the system

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B

We should heat the system

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C

We should apply external force

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D

It cannot be separated

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Solution

The correct option is D We should cool the system
The linear expansion of coefficient of brass is more than steel .The system must be cooled which causes more contraction in brass disc and less contraction in the hole of steel plate. The disc becomes loose.

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