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Assertion : When a current flows in the ...

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.

A

If both assertion ans reason are true ans reaason is the correct explanation of assertion.

B

If both assertion and reason are true but reason is not the correct explanation of assertion.

C

If assertion istrue but reason is false.

D

If both assertion and reason are false.

Text Solution

Verified by Experts

The correct Answer is:
B
When alternating current flows through the coil of a transformer, the core of transormer is magnetised and demagnetised repeatedly. The electrical energy taken by the core during magnetisation is not returned fully in demagnetisation. The energy remaining in the core appears in the from of heat.
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