Assertion :A brass disc is just fitted in a hole in a steel plate. The system must be cooled to loosen the disc from the hole. Reason: The coefficient of linear expansion for brass is greater than the coefficient of linear expansion for steel.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Assertion is incorrect but Reason is correct

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Solution

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
Since the brass has higher coefficient of expansion as compared to steel. So when it will be cooled, the brass will shrink more than steel plate and will get loosen from the steel disc.
Hence option A is correct.

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