JEE Main 2021PhysicsAlternating CurrentEasyMCQ

JEE Main 2021 — Alternating Current Question with Solution

JEE Main 2021 (26 Feb Shift 1)

Question

An alternating current is given by the equation i=i1sinωt+i2cosωt. The rms current will be:

Choose an option

Show full solutionCorrect option: D
Correct answer
D12i12+i2212

Step-by-step explanation

i=i1sinωt+i2sinωt+90

i=i12+i22sinωt+ϕ

irms=i02=i12+i222

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About this question

This is a previous-year question from JEE Main 2021, covering the Alternating Current chapter of Physics. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.