Physics · JEE

Important Questions: Electromagnetic Induction and Alternating Currents for JEE

16+ syllabus-aligned questions available

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The most important Electromagnetic Induction and Alternating Currents questions for JEE cover conceptual traps, standard results, and numerical patterns from Electromagnetic induction: Faraday's law, induced emf and current, Lenz's law, eddy currents, self and mutual inductance, Alternating currents, peak and RMS value of alternating current/voltage, Reactance and impedance, LCR series circuit, resonance, power in AC circuits, wattless current, AC generator and transformer. Goodmarks provides 16+ high-yield MCQs with full solutions.

Focus on what matters most. These important Electromagnetic Induction and Alternating Currents questions cover high-weightage concepts from Electromagnetic induction: Faraday's law, induced emf and current, Lenz's law, eddy currents, self and mutual inductance, Alternating currents, peak and RMS value of alternating current/voltage, Reactance and impedance, LCR series circuit, resonance, power in AC circuits, wattless current, AC generator and transformer — the topics JEE repeats every year.

Subtopics in Electromagnetic Induction and Alternating Currents

Electromagnetic induction: Faraday's law, induced emf and current, Lenz's law, eddy currents, self and mutual inductance
Alternating currents, peak and RMS value of alternating current/voltage
Reactance and impedance, LCR series circuit, resonance, power in AC circuits, wattless current
AC generator and transformer

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Q1PhysicsUnit 14: Electromagnetic Induction and Alternating Currents

The average half-cycle value of a sine wave with a

40 V

peak is

Q2PhysicsUnit 14: Electromagnetic Induction and Alternating Currents

Which of the following statement regarding transformer is incorrect?

Q3PhysicsUnit 14: Electromagnetic Induction and Alternating Currents

Magnitude of e.m.f. produced in a coil when a magnet is inserted into it does not depend upon:

Q4PhysicsUnit 14: Electromagnetic Induction and Alternating Currents

toppr Q Type your question insulated from each other. The entire loop lies in the plane (of the paper). A uniform magnetic field

B

point into the plane of the paper. At

t=0,

the loop starts rotating about the common diameter as axis with a constant angular velocity

\omega

in the magnetic field Which of the following options is/are correct? This question has multiple correct options

Q5PhysicsUnit 14: Electromagnetic Induction and Alternating Currents

In an a.c. circuit

\mathrm{V}

and I are given by

V=50 \sin 50 t

volt and

I=

100 \sin (50 t+\pi / 3) \mathrm{mA} .

The power dissipated in the circuit

Q6PhysicsUnit 14: Electromagnetic Induction and Alternating Currents

The current flowing through the resistor in a series LCR a.c. circuit, is

\boldsymbol{I}=\varepsilon / \boldsymbol{R}

Now the inductor and capacitor are connected in parallel and joined in series with the resistor as shown in figure. The current in the circuit is now. (Symbols have their usual meaning)

Q7PhysicsUnit 14: Electromagnetic Induction and Alternating Currents

A current is induced in a coil by electromagnetic induction.

Q8PhysicsUnit 14: Electromagnetic Induction and Alternating Currents

In series LCR circuit

R=18 \Omega

and impedance is

33 \Omega

. An r.m.s. voltage

220 V

is applied across the circuit. The true power consumed in a.c. circuit is

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Frequently asked questions

What makes a Electromagnetic Induction and Alternating Currents question "important" for JEE?

Important questions test core concepts that appear frequently across JEE Main and Advanced papers — definitions, standard formulas, and classic problem types.

Which subtopics in Electromagnetic Induction and Alternating Currents are high-weightage?

Key areas include Electromagnetic induction: Faraday's law, induced emf and current, Lenz's law, eddy currents, self and mutual inductance, Alternating currents, peak and RMS value of alternating current/voltage, Reactance and impedance, LCR series circuit, resonance, power in AC circuits, wattless current, AC generator and transformer. Prioritise these before moving to edge cases.

How many important questions should I revise?

Revise 30–50 important MCQs per unit in the last month before JEE. Focus on questions you got wrong at least once.

Can I practise only important questions on Goodmarks?

Pro users can filter by unit and subtopic to target high-yield areas. Free users can attempt sample questions on this page.