Question

Assertion : In an ideal step-down transformer, the electrical energy is not lost. Reason (R): In a step-down transformer, voltage decreases but the current increases.

• A. If both Assertion and Reason (R) are true and Reason (R) is the correct explanation of Assertion .
• B. If both Assertion and Reason (R) are true but Reason (R) is not the correct explanation of Assertion .
• C. If Assertion is true but Reason (R) is false.
• D. If both Assertion and Reason (R) are false.

Hint:

In an ideal transformer, energy conservation occurs without losses, even when voltage and current change.

Answer 1

The Correct Option is B

Step 1: Analyzing the Assertion. In an ideal step-down transformer, electrical energy is conserved, and no energy is lost in an ideal case. Hence, Assertion is true.

Step 2: Analyzing the Reason. While it is true that in a step-down transformer the voltage decreases and the current increases, this is not the reason why electrical energy is conserved. The energy conservation in an ideal transformer is independent of this fact. Hence, Reason (R) is true, but it is not the correct explanation for Assertion .

Step 3: Conclusion. Thus, the correct answer is if both Assertion and Reason (R) are true but Reason (R) is not the correct explanation of Assertion .