self induction and L-R circuit questions with solutions

Showing 1–10 of 13 questions

• NumericeasyElectromagnetic Inductionself induction and L-R circuit

  The current in an inductor is given by I = (3t + 8) where t is in second. The magnitude of induced emf produced in the inductor is 12 mV. The self-inductance of the inductor _______ mH.

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  JEE Mains 2024 05 Apr Evening Shift

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• NumericmediumElectromagnetic Inductionself induction and L-R circuit

  As per the given figure, if dI/dt = -1 A s⁻¹, then the value of $V_{AB}$ at this instant will be _____ V.

  

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  JEE Mains30 January 2023Shift 1Morning Shift

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• IntegermediumElectromagnetic Inductionself induction and L-R circuit

  An inductor L = 4 H and resistor R = 25 Ω are in series with a DC source of emf E. If (aE²)/(2b) J s⁻¹ represents the maximum rate at which magnetic energy is stored, find b/a.

  

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  JEE Mains13 April 2023Shift 1Morning Shift

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• MCQeasyElectromagnetic Inductionself induction and L-R circuit

  Self-inductance of an ideal coil depends on:

  Options

  • Option A

    Only geometry

  • Option B

    Only medium property

  • Option C

    Geometry and medium property

  • Option D

    Current through the inductor

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  JEE Mains 2025 23 Jan Morning Shift

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• MCQeasyElectromagnetic Inductionself induction and L-R circuit

  In a coil, the current changes form -2 A to +2 A in 0.2 s and induces an emf of 0.1 V. The self-inductance of the coil is :

  Options

  • Option A

    5 mH

  • Option B

    1 mH

  • Option C

    2.5 mH

  • Option D

    4 mH

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  JEE Mains 2024 06 Apr Evening Shift

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• MCQmediumElectromagnetic Inductionself induction and L-R circuit

  A solenoid is 30 cm long, has 10 turns per centimetre and cross-sectional area 5 cm². Its current changes uniformly from 2 A to 4 A in 3.14 s. What is the magnitude of the self-induced emf if it is written as α×10⁻⁵ V?

  Options

  • Option A

    60×10⁻⁵ V

  • Option B

    12×10⁻⁵ V

  • Option C

    120×10⁻⁵ V

  • Option D

    34×10⁻⁵ V

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  JEE Mains 2026 8 April Evening Shift

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• NumericmediumElectromagnetic Inductionself induction and L-R circuit

  Inductance of a coil with 10⁴ turns is 10 mH and it is connected to a dc source of 10 V with internal resistance of 10 Ω. The energy density in the inductor when the current reaches (1/e) of its maximum value is απ × (1/e²) J/m³. The value of α is ___.

  (μ₀ = 4π × 10⁻⁷ Tm/A)

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  JEE Mains 202622 January Morning Shift

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• MCQmediumElectromagnetic Inductionself induction and L-R circuit

  A 12 V battery is connected to a coil of resistance 6 Ω. The steady current is interrupted in 1 ms and the induced emf across the coil is 20 V. The inductance is:

  Options

  • Option A

    8 mH

  • Option B

    10 mH

  • Option C

    12 mH

  • Option D

    5 mH

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  15 April 2023 Morning Shift

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• IntegereasyElectromagnetic Inductionself induction and L-R circuit

  A coil has inductance 2 H and resistance 4 Ω. A 10 V DC source is applied. After current reaches steady state, the magnetic energy is ______ × 10⁻² J.

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  JEE Mains11 April 2023Shift 2Evening Shift

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• MCQeasyElectromagnetic Inductionself induction and L-R circuit

  An inductor of inductance 10 mH has internal resistance 100 Ω and is connected to an ideal 1.0 V battery through a switch, as shown in the figure. After the switch is closed, what is the ratio of the instantaneous inductive voltages when the current is 2 mA and 4 mA, respectively?

  

  Options

  • Option A

    4/3

  • Option B

    $\frac{3}{4}$

  • Option C

    5/3

  • Option D

    3/5

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  JEE Mains 2026 6 April Morning Shift

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