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

Showing 1–10 of 33 questions

• MCQmediumAc Cirucuitsseries 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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• IntegermediumAc Cirucuitsseries combination of ac circuit and L-C-R circuit

  An inductor of reactance 100 Ω, a capacitor of reactance 50 Ω and a resistor of resistance 50 Ω are connected in series to a 10 V rms AC source. Find the average power dissipated in watts.

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  JEE Mains 2025 7 April Evening Shift

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• NumericeasyAc Cirucuitsseries combination of ac circuit and L-C-R circuit

  A capacitor of reactance 4√3 Ω and a resistor of resistance 4 Ω are connected in series with an ac source of peak value 8√2 V. The power dissipation in the circuit is ______ W.

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  JEE Mains 2024 09 Apr Evening Shift

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• MCQmediumAc Cirucuitsseries combination of ac circuit and L-C-R circuit

  In a series LCR circuit, L=100 mH and C=1 nF. The angular frequency at which current amplitude is maximum is:

  Options

  • Option A

    10⁴/(2π) rad s⁻¹

  • Option B

    10⁵/(2π) rad s⁻¹

  • Option C

    10⁵ rad s⁻¹

  • Option D

    10⁶ rad s⁻¹

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  JEE Mains 2025 23 Jan Evening Shift

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• IntegereasyAc Cirucuitsseries combination of ac circuit and L-C-R circuit

  A series LCR circuit has R = 20 Ω, L = 1.6 H and C = 40 μF. It is connected to a variable-frequency AC source. If the inductive reactance at resonance is N ohms, find N.

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  JEE Mains 2026 5 April Evening Shift

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• NumericmediumAc Cirucuitsseries combination of ac circuit and L-C-R circuit

  A series LCR circuit with L = 100/π mH, C = 10⁻³/π F and R = 10 Ω, is connected across an ac source of 220 V, 50 Hz supply. The power factor of the circuit would be ________.

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  JEE Mains 2024 27 Jan Evening Shift

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• MCQeasyAc Cirucuitsseries combination of ac circuit and L-C-R circuit

  In a series LCR circuit, the capacitance is changed from C to 4C. To keep the resonance frequency unchanged, the new inductance should be:

  Options

  • Option A

    reduced by L/4

  • Option B

    increased by 2L

  • Option C

    reduced by 3L/4

  • Option D

    increased to 4L

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  JEE Mains 2024 01 Feb Morning Shift

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• NumericmediumAc Cirucuitsseries 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 Cirucuitsseries combination of ac circuit and L-C-R circuit

  A bulb and a capacitor are connected in series across an ac supply. A dielectric is then placed between the plates of the capacitor. The glow of the bulb:

  Options

  • Option A

    increases

  • Option B

    remains same

  • Option C

    becomes zero

  • Option D

    decreases

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  JEE Mains 2024 09 Apr Morning Shift

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• MCQeasyAc Cirucuitsseries combination of ac circuit and L-C-R circuit

  Given below are two statements: Statement I: An AC circuit undergoes electrical resonance if it contains either a capacitor or an inductor. Statement II: An AC circuit containing a pure capacitor or a pure inductor consumes high power due to its non-zero power factor. Choose the correct answer.

  Options

  • Option A

    Statement I is false but Statement II is true

  • Option B

    Statement I is true but Statement II is false

  • Option C

    Both Statement I and Statement II are false

  • Option D

    Both Statement I and Statement II are true

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  13 April 2023 Evening Shift

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