series combination of ac circuit and L-C-R circuit questions with solutions

Showing 1–10 of 48 questions

• MCQmediumAC Circuitsseries combination of ac circuit and L-C-R circuit

  An alternating voltage V(t) = 220 sin 100πt volt is applied to a purely resistive load of 50 Ω. The time taken for the current to rise from half of the peak value to the peak value is:

  Options

  • Option A

    5 ms

  • Option B

    3.3 ms

  • Option C

    7.2 ms

  • Option D

    2.2 ms

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  JEE Mains 2024 30 Jan Evening Shift

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• MCQmediumAC Circuitsseries combination of ac circuit and L-C-R circuit

  A series L,R circuit connected with an ac source E = (25 sin 1000 t) V has a power factor of 1/√2. If the source of emf is changed to E = (20 sin 2000 t)V, the new power factor of the circuit will be :

  Options

  • Option A

    1/√2

  • Option B

    1/√3

  • Option C

    1/√5

  • Option D

    1/√7

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  JEE Mains 2024 30 Jan Morning Shift

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• NumericmediumAC Circuitsseries combination of ac circuit and L-C-R circuit

  An inductor stores 16 J of magnetic field energy and dissipates 32 W of thermal energy due to its resistance when an a.c. current of 2 A (rms) and frequency 50 Hz flows through it. The ratio of inductive reactance to its resistance is ________.

  (π = 3.14)

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  JEE Mains 202628 January Evening Shift

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• MCQmediumAC Circuitsseries combination of ac circuit and L-C-R circuit

  A coil of negligible resistance is connected in series with 90 Ω resistor across 120 V, 60 Hz supply. A voltmeter reads 36 V across resistance. Inductance of the coil is:

  Options

  • Option A

    0.76 H

  • Option B

    2.86 H

  • Option C

    0.286 H

  • Option D

    0.91 H

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  JEE Mains 2024 08 Apr Evening Shift

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• MCQeasyAC Circuitsseries combination of ac circuit and L-C-R circuit

  An alternating voltage source V = 260 sin(628t) is connected across a pure inductor of 5 mH. Inductive reactance in the circuit is:

  Options

  • Option A

    3.14 Ω

  • Option B

    6.28 Ω

  • Option C

    0.5 Ω

  • Option D

    0.318 Ω

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  JEE Mains31 January 2023Shift 2Evening Shift

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• NumericmediumAC Circuitsseries combination of ac circuit and L-C-R circuit

  An inductor of 0.5 mH, a capacitor of 20 μF and resistance of 20 Ω are connected in series with a 220 V AC source. If the current is in phase with the emf, the amplitude of current is √x A. The value of x is:

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  JEE Mains31 January 2023Shift 1Morning Shift

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• NumericmediumAC Circuitsseries combination of ac circuit and L-C-R circuit

  For a given series LCR circuit it is found that maximum current is drawn when value of variable capacitance is 2.5 nF. If resistance of 200 Ω and 100 mH inductor is being used in the given circuit. The frequency of ac source is _____ × 10³ Hz. (given π² = 10)

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  JEE Mains 2024 06 Apr Evening Shift

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• MCQmediumAC Circuitsseries combination of ac circuit and L-C-R circuit

  For the given figures, choose the correct option:

  

  Options

  • Option A

    The rms current in circuit (b) can never be larger than that in (a)

  • Option B

    The rms current in figure (a) is always equal to that in figure (b)

  • Option C

    The rms current in circuit (b) can be larger than that in (a)

  • Option D

    At resonance, current in (b) is less than that in (a)

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  JEE Mains29 January 2023Shift 2Evening Shift

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• NumericmediumAC Circuitsseries combination of ac circuit and L-C-R circuit

  A series LCR circuit is connected to an AC source of 220 V, 50 Hz. The circuit contains a resistance R = 80 Ω, an inductor of inductive reactance X(L) = 70 Ω, and a capacitor of capacitive reactance X(C) = 130 Ω. The power factor of circuit is x/10. The value of x is :

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  JEE Mains25 January 2023Shift 2Evening Shift

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• MCQeasyAC Circuitsseries combination of ac circuit and L-C-R circuit

  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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