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self induction and L-R circuit questions with solutions
Practice Electromagnetic Induction for JEE Main, JEE Advanced, NEET, and Classes 11–12. Attempt each question, then open it for the full solution.
Showing 1–10 of 11 questions
- NumericeasyElectromagnetic Induction
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.
JEE Mains 2024 05 Apr Evening Shift
Open question & full solution → - IntegermediumElectromagnetic Induction
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.
JEE Mains13 April 2023Shift 1Morning Shift
Open question & full solution → - NumericmediumElectromagnetic Induction
Three identical resistors with resistance R = 12Ω and two identical inductors with self inductance L=5 mH are connected to an ideal battery with emf of 12 V as shown in figure. The current through the battery long after the switch has been closed will be________A.
JEE Mains24 January 2023Shift 2Evening Shift
Open question & full solution → - MCQeasyElectromagnetic Induction
Self-inductance of an ideal coil depends on:
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JEE Mains 2025 23 Jan Morning Shift
Open question & full solution → - NumericmediumElectromagnetic Induction
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)
JEE Mains 202622 January Morning Shift
Open question & full solution → - MCQmediumElectromagnetic Induction
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:
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15 April 2023 Morning Shift
Open question & full solution → - MCQmediumElectromagnetic Induction
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?
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JEE Mains 2026 8 April Evening Shift
Open question & full solution → - MCQeasyElectromagnetic Induction
Figure shows the circuit that contains three resistances (9 Ω each) and two inductors (4 mH each). The reading of ammeter at the moment switch K is turned ON, is _________A.
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JEE Mains 202622 January Evening Shift
Open question & full solution → - MCQeasyElectromagnetic Induction
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 :
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JEE Mains 2024 06 Apr Evening Shift
Open question & full solution → - IntegermediumElectromagnetic Induction
In the circuit shown in the figure, inductors L₁, L₂ and L₃ all have the same inductance L. Inductor L₁ is in series with a parallel combination of L₂ and L₃. Neglect mutual inductance. If U(total) is the total magnetic energy stored in the circuit and U(L₂) is the energy stored in inductor L₂, find U(total) /U(L₂).
JEE Mains 2026 5 April Morning Shift
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