JEE Main 2022PhysicsElectromagnetic InductionEasyMCQ

JEE Main 2022 — Electromagnetic Induction Question with Solution

JEE Main 2022 (26 Jun Shift 1)

Question

The magnetic flux through a coil perpendicular to its plane is varying according to the relation ϕ=5t3+4t2+2t-5 Weber. If the resistance of the coil is 5 ohm, then the induced current through the coil at t=2 s will be,

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Show full solutionCorrect option: A
Correct answer
A15.6 A

Step-by-step explanation

Given, ϕ=5t3+4t2+2t-5

Magnitude of induced emf ε=dϕdt=15t2+8t+2

At, t=2 s, ε=60+16+2=78 V

Current, i=εR=785=15.6 A

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About this question

This is a previous-year question from JEE Main 2022, covering the Electromagnetic Induction 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.