JEE Main 2020 — Electromagnetic Induction Question with Solution
From: JEE Main 2020 (Online) 9th January Morning Slot
Question
In a fluorescent lamp choke (a small
transformer) 100 V of reverse voltage is
produced when the choke current changes
uniformly from 0.25 A to 0 in a duration of
0.025 ms. The self-inductance of the choke
(in mH) is estimated to be ________.
Enter your answer
Show full solutionCorrect answer: 10
Correct answer
10
Step-by-step explanation
V =
L = = = 10 mH
L = = = 10 mH
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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.