JEE Main 2020PhysicsElectromagnetic InductionHardMCQ

JEE Main 2020 — Electromagnetic Induction Question with Solution

JEE Main 2020 (08 Jan Shift 1)

Question

At time t=0 magnetic field of 1000 Gauss is passing perpendicularly through the area defined by the closed loop shown in the figure. If the magnetic field reduces linearly to 500 Gauss, in the next 5s, then induced EMF in the loop is:

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Show full solutionCorrect option: A
Correct answer
A56μV

Step-by-step explanation

ε=-dϕdt=-AdBdt
ε= − Δϕ Δt = AΔB Δt
=16×4-4×21000-5005×10-4×10-4
=56×5005×10-8=56×10-6V

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About this question

This is a previous-year question from JEE Main 2020, 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.