Series AC Circuits: Impedance, Phase Difference, Resonance and Power Factor questions with solutions

Showing 1–10 of 117 questions

• MCQeasyAC CircuitsSeries AC Circuits: Impedance, Phase Difference, Resonance and Power Factor

  A series LCR circuit is subjected to an AC signal of 200 V, 50 Hz. If the voltage across the inductor (L = 10 mH) is 31.4 V, then the current in this circuit is ________ :

  Options

  • Option A

    68 A

  • Option B

    63 A

  • Option C

    10 A

  • Option D

    10 mA

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  JEE Mains 2024 05 Apr Evening Shift

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• NumericmediumAC CircuitsSeries AC Circuits: Impedance, Phase Difference, Resonance and Power Factor

  When a coil is connected across a 20 V dc supply, it draws a current of 5 A. When it is connected across 20 V, 50 Hz ac supply, it draws a current of 4 A. The self inductance of the coil is ______ mH. (Take π = 3)

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  JEE Mains 2024 09 Apr Morning Shift

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• MCQeasyAC CircuitsSeries AC Circuits: Impedance, Phase Difference, Resonance and Power Factor

  Determine the net impedance of the AC circuit shown in the figure (50 Hz, 220 V). [Image]

  Options

  • Option A

    5√5 Ω

  • Option B

    25 Ω

  • Option C

    10√2 Ω

  • Option D

    15 Ω

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  NEET 2023NEET Previous Year

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• NumericeasyAC CircuitsSeries AC Circuits: Impedance, Phase Difference, Resonance and Power Factor

  A series RL circuit has R = 30 Ω and Xʟ = 40 Ω. It is connected to a 250 V RMS source. Calculate the RMS voltage across the inductor in volt.

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• MCQeasyAC CircuitsSeries AC Circuits: Impedance, Phase Difference, Resonance and Power Factor

  For the graph shown, identify curves A and B. Here $X_{C}$ is capacitive reactance and $X_{L}$ is inductive reactance.

  

  Options

  • Option A

    A = $X_{L}$, B = R

  • Option B

    A = $X_{L}$, B = Z

  • Option C

    A = $X_{C}$, B = R

  • Option D

    A = $X_{C}$, B = $X_{L}$

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  JEE Mains11 April 2023Shift 1Morning Shift

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• A/RmediumAC CircuitsSeries AC Circuits: Impedance, Phase Difference, Resonance and Power Factor

  Read the following assertion and reason and choose the correct option.

  Assertion

  Assertion (A): The voltage across the inductor in a series LCR circuit can be greater than the applied source voltage.

  Reason

  Reason (R): The voltages Vᵣ, Vʟ and Vᴄ are always added as ordinary algebraic numbers.

  Options

  • Option A

    Both A and R are true and R is the correct explanation of A.

  • Option B

    Both A and R are true but R is NOT the correct explanation of A.

  • Option C

    A is true but R is false.

  • Option D

    A is false but R is true.

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• NumericmediumAC CircuitsSeries AC Circuits: Impedance, Phase Difference, Resonance and Power Factor

  When a dc voltage of 100 V is applied to an inductor, a dc current of 5 A flows through it. When an ac voltage of 200 V peak value is connected to inductor, its inductive reactance is found to be 20√3 Ω. The power dissipated in the circuit is _________ W.

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  JEE Mains 2024 06 Apr Morning Shift

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• MCQmediumAC CircuitsSeries AC Circuits: Impedance, Phase Difference, Resonance and Power Factor

  A series LCR circuit has inductance L = 10 H, capacitance C = 10 μF and resistance R = 50 Ω. It is connected to V(t) = 200 sin(100πt) volts. Find the resonance frequency f₀ and source frequency f.

  Options

  • Option A

    f₀ = f = 50 Hz

  • Option B

    f₀ = 50/π Hz, f = 50 Hz

  • Option C

    f₀ = 2 Hz, f = 50 Hz

  • Option D

    f₀ = 100 Hz, f = 50 Hz

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  NEET 2022NEET Previous Year

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• MCQeasyAC CircuitsSeries AC Circuits: Impedance, Phase Difference, Resonance and Power Factor

  A series RL circuit draws 5 A RMS from a 200 V RMS source and consumes 800 W average power. Determine its power factor.

  Options

  • Option A

    0.4

  • Option B

    0.6

  • Option C

    0.8

  • Option D

    1.0

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• MCQeasyAC CircuitsSeries AC Circuits: Impedance, Phase Difference, Resonance and Power Factor

  In a series RL circuit, the RMS voltage across the resistor is equal to the RMS voltage across the inductor. What is the power factor of the circuit?

  Options

  • Option A

    1/2

  • Option B

    1/√2

  • Option C

    √3/2

  • Option D

    1

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