CUET · PHYSICS · PYQ PAPER 2023
Which of the following is not correct for an ac circuit ?
- A The applied rms voltage equal to algebric sum of the rms voltages across the series elements of the circuit.
- B A capacitor is used in the primary circuit of an induction coil.
- C The impedance will be minimum when power factor the LCR circuit is unit
- D At resonance the current obtained is maximum in a LCR circuit.
Answer & Solution
Correct Answer
(A) The applied rms voltage equal to algebric sum of the rms voltages across the series elements of the circuit.
Step-by-step Solution
Detailed explanation
In a series AC circuit (like an LCR circuit), the voltages across the resistor, inductor, and capacitor are not in phase. Therefore, the total applied RMS voltage is the phasor (vector) sum-specifically \(V=\sqrt{V_R^2+\left(V_L-V_C\right)^2}\)-rather than a simple algebraic…
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