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Physics · 2026 · 1 mark
CBSE 2026 · Region 1 · Set 3 · Q12
A series LCR circuit with R =3 Ω, X_C =4 Ω, X_L =8 Ω is connected to a 220 V, 50 Hz ac source. The power factor for the circuit is
A series LCR circuit with $\displaystyle \mathrm{R}=3 \Omega, \mathrm{X}_{\mathrm{C}}=4 \Omega, \mathrm{X}_{\mathrm{L}}=8 \Omega$ is connected to a $\displaystyle 220 \mathrm{~V}, 50 \mathrm{~Hz}$ ac source. The power factor for the circuit is
Official answer
(D)
$\displaystyle 0.60$
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CBSE Class 12 Physics past-paper question from the 2026 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.