| Directions: In the following questions, a statement of Assertion [A] is followed by a statement of Reason (R). |
| Mark the correct choice as: |
| Assertion [A]: An ideal transformer does not vary the power. |
| Reason (R): A transformer is used to step-up or step-down AC voltages. |
A) Both Assertion [A] and Reason (R) are true and Reason (R) is the correct explanation of Assertion [A]
B) Both Assertion [A] and Reason (R) are true but Reason (R) is not the correct explanation of Assertion [A]
C) Assertion [A] is true but Reason (R) is false
D) Assertion [A] is false and Reason (R) is also false
Correct Answer: B
Solution :
(b) By using a transformer, voltage can be increased or decreased. An ideal transformer is one in which there is no energy loss. If there is no loss of energy, then the entire input power is transferred from the primary to the secondary i.e., output.
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