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Physics · 2025 · 1 mark
CBSE 2025 · Region 2 · Set 1 · Q16
Assertion (A): In an ideal step-down transformer, the electrical energy is not lost. Reason (R): In a step-down transformer, voltage decreases but…
Assertion (A) : 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.
Official answer
(B)
If both Assertion (A) and Reason (R) are true but Reason (R) is not the correct explanation of Assertion (A) .
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CBSE Class 12 Physics past-paper question from the 2025 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.