Physics · JEE

Alternating currents, peak and RMS value of alternating current/voltage Concepts for JEE

16+ syllabus-aligned questions available

Quick answer

Master Alternating currents, peak and RMS value of alternating current/voltage by understanding definitions, standard results, and typical JEE question patterns — then practise with syllabus-aligned MCQs on Goodmarks.

Build clear conceptual foundations for Alternating currents, peak and RMS value of alternating current/voltage before speed practice. This guide covers what JEE expects and how to test yourself with MCQs.

Concept explainer

Alternating currents, peak and RMS value of alternating current/voltage is a core JEE Main Physics subtopic under Electromagnetic Induction and Alternating Currents. Master the definitions, standard results, and typical MCQ patterns tested in JEE Main and Advanced.

Key points

Understand the definition and scope of Alternating currents, peak and RMS value of alternating current/voltage in the JEE syllabus
Memorise key formulas and standard results linked to Alternating currents, peak and RMS value of alternating current/voltage
Practise 20–40 syllabus-aligned MCQs with step-by-step solutions

JEE tips

Revise Alternating currents, peak and RMS value of alternating current/voltage with a one-page formula sheet before attempting mixed tests
After each practice set, log mistakes specific to Alternating currents, peak and RMS value of alternating current/voltage and reattempt after 48 hours

Common trap

Students often rush Alternating currents, peak and RMS value of alternating current/voltage questions without checking units, sign conventions, or boundary conditions — always verify assumptions before calculating.

Syllabus context

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

Free sample questions

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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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Frequently asked questions

What concepts in Alternating currents, peak and RMS value of alternating current/voltage are essential for JEE?

Focus on core ideas across Alternating currents, peak and RMS value of alternating current/voltage. JEE tests application, not just memorisation.