For series LCR circuit, which one of the following is a CORRECT statement? (a) Potential difference across resistance R and that across capacitor have phase difference (πc)/(2). (b) Applied e.m.f. and potential difference across resistance ' R ' are in the same phase (c) Applied e.m.f. and potential difference inductor coil has phase difference of (πc)/(2) (d) Potential difference across capacitor and that across inductor have phase difference of (πc)/(2).

Answer: (a). (a) VR is in phase with i, VC lags i by π/2: phase difference π/2. Correct. (b) Applied e.m.f. is in phase with VR only at resonance, not in general. (c) e.m.f. and VL differ by π/2 - φ, not π/2 in general. (d) VC and VL differ by π, not π/2. So the answer is (a).

For series LCR circuit, which one of the following is a CORRECT… | MHT CET 2021 (23 Sep, Shift 1)

Q47MHT CET 2021 · 23 SEP · SHIFT 1Easy

Series LCR Circuit

For series LCR circuit, which one of the following is a CORRECT statement?

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Answer: (a)

(a) $V_R$ is in phase with $i$ , $V_C$ lags $i$ by $\pi/2$ : phase difference $\pi/2$ . Correct.
(b) Applied e.m.f. is in phase with $V_R$ only at resonance, not in general.
(c) e.m.f. and $V_L$ differ by $\pi/2 - \phi$ , not $\pi/2$ in general.
(d) $V_C$ and $V_L$ differ by $\pi$ , not $\pi/2$ .
So the answer is (a).

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Series LCR Circuit question from MHT CET 2021 (23 Sep, Shift 1)

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