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Physics · 2023 · 1 mark
CBSE 2023 · Region 4 · Set 2 · Q12
An ac voltage v = v_0 sin ω t is applied to a series combination of a resistor R and an element X. The instantaneous current in the circuit is I =…
An ac voltage $\displaystyle \mathrm{v}=\mathrm{v}_{0} \sin \omega \mathrm{t}$ is applied to a series combination of a resistor $\displaystyle \mathrm{R}$ and an element $\displaystyle \mathrm{X}$. The instantaneous current in the circuit is $\displaystyle \mathrm{I}=\mathrm{I}_{0} \sin \left(\omega \mathrm{t}+\frac{\pi}{4}\right)$. Then which of the following is correct?
Official answer
(D)
$\displaystyle \mathrm{X}$ is a capacitor and $\displaystyle \mathrm{X}_{\mathrm{C}}=\mathrm{R}$
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CBSE Class 12 Physics past-paper question from the 2023 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.