Physics · JEE

Important Questions: Alternating currents, peak and RMS value of alternating current/voltage for JEE

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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

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

Q3PhysicsUnit 14: Electromagnetic Induction and Alternating Currents

A steady current of magnitude

I

and an

A C

current of peak value

I

are allowed to pass through identical resistor for the same time. The ratio of heat produced in the two resistors will be :

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What makes a Alternating currents, peak and RMS value of alternating current/voltage 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 Alternating currents, peak and RMS value of alternating current/voltage. Prioritise these before moving to edge cases.

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

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