CBSE 2025 · Region 4 · Set 1 · Q14 · 1 mark
Assertion (A) : A series LCR circuit behaves as a pure resistive circuit at resonance. Reason $\displaystyle (R): \quad$ At resonance, $\displaystyle \mathrm{X}_{\mathrm{L}}=\mathrm{X}_{\mathrm{C}}$ gives $\displaystyle \omega=\frac{1}{\sqrt{\mathrm{LC}}}$.
Official answer
From CBSE’s own marking scheme for this paper.
(A)
Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A) .
Alternating CurrentAC Voltage Applied to a Series LCR CircuitUnderstandassertion_reasonmedium
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CBSE Class 12 Physics past-paper question from the 2025board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.