Assertion :When a current flows in the coil of a transformer then its core becomes hot. Reason: The core of transformer is made of soft-iron.

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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Both Assertion and Reason are incorrect

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Solution

The correct option is B Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
When current passes through any conductor heat is generated by the relation $H = (I^{2}) R$ and thus it becomes hot. Hence it can be any conductor.

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