| Assertion: When a current flows in the coil of a transformer then its core becomes hot. |
| Reason: The core of transformer is made of iron. |
A) If both assertion and reason are true and reason is the correct explanation of assertion.
B) If both assertion and reason are true and reason is not the correct explanation of assertion.
C) If assertion is true but reason is false.
D) If both assertion and reason are false.
E) If assertion is false but reason is true.
Correct Answer: B
Solution :
When alternating current flows through the coil of a transformer, the core of transformer is magnetized and demagnetized repeatedly. The electrical energy taken by the core during magnetization is not returned fully in demagnetisation. The energy remaining in the core appears in the form of heat.
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