JEE Main 2020PhysicsElectromagnetic InductionMediumNumerical

JEE Main 2020 — Electromagnetic Induction Question with Solution

JEE Main 2020 (09 Jan Shift 1)

Question

In a fluorescent lamp choke (a small transformer) 100V of reverse voltage is produced when the choke current changes uniformly from 0.25A to 0 in a duration of 0.025ms . The self-inductance of the choke (in mH ) is estimated to be ________

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Show full solutionCorrect answer: 10
Correct answer
10

Step-by-step explanation

100=L0.250.025×103
∴L=100×10-4H
=10 mH

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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.