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Assertion (A): When a circular disc with a hole is heated, the diameter of the hole increases.
Reason (R): The distance between the molecules at the periphery of the hole increases as solid expands.

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Both ‘A’ and ‘R’ are true and ‘R’ is not the correct explanation of ‘A’

Both ‘A’ and ‘R are true and ‘R’ is the correct explanation of ‘A’

‘A’ is true and ‘R’ is false

‘A’ is false and ‘R’ is true.

answer is A.

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Detailed Solution

When a body is heated, its length, surface area, and volume increase. Hence, when the metal disc is heated it will expand and the diameter of the hole will increase.

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