Physics · JEE

Alternating currents, peak and RMS value of alternating current/voltage Previous Year Questions for JEE

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Goodmarks offers 16+ JEE-style PYQs for Alternating currents, peak and RMS value of alternating current/voltage with detailed solutions. While official past papers rotate yearly, our bank covers the same concepts, difficulty, and question formats tested in JEE Physics.

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Syllabus context

Part of Electromagnetic Induction and Alternating Currents in JEE Main Physics.

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Q1PhysicsUnit 14: Electromagnetic Induction and Alternating Currents

Choose the incorrect statement.

Q2PhysicsUnit 14: Electromagnetic Induction and Alternating Currents

An alternating voltage given as

\boldsymbol{V}=

\mathbf{1 0 0} \sqrt{\mathbf{2}} \sin 100 t \quad

is applied to a capacitor of

1 \mu F

. The current reading of the ammeter will be equal to

\mathrm{mA}

Q3PhysicsUnit 14: Electromagnetic Induction and Alternating Currents

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

40 V

peak is

Q4PhysicsUnit 14: Electromagnetic Induction and Alternating Currents

A sinusoidal voltage

V=200 \sin 314 t

is applied to a

10 \Omega

resistor. Find rms current

Q5PhysicsUnit 14: Electromagnetic Induction and Alternating Currents

An LC circuit has

L=5 \mathrm{mH}

and

C=20 \mu \mathrm{F}

\boldsymbol{v}=\mathbf{5} \times \mathbf{1 0}^{-\mathbf{3}}

coswt is supplied. is twice the resonant frequency. Find the maximum charge stored in the capacitor:

Q6PhysicsUnit 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

Q7PhysicsUnit 14: Electromagnetic Induction and Alternating Currents

In a circuit the coil of a choke:

Q8PhysicsUnit 14: Electromagnetic Induction and Alternating Currents

The figure given shows the variation of an alternating emf with time. What is the average value of the emf for the shaded part of the graph?

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Why practise PYQs for Alternating currents, peak and RMS value of alternating current/voltage?

PYQs reveal recurring concepts, common traps, and the difficulty level JEE expects. Solving them builds exam temperament and time management.

Does Goodmarks have actual JEE past papers?

Our bank includes exam-style MCQs aligned with JEE Main Physics syllabus for Alternating currents, peak and RMS value of alternating current/voltage, covering the same topics as previous year papers.

How should I use PYQs for Electromagnetic Induction and Alternating Currents?

Solve timed sets, review every explanation, note weak subtopics, then revisit with focused practice on Goodmarks.

Are PYQ solutions step-by-step?

Yes. Every question includes the correct answer and a detailed explanation showing the reasoning.