JEE Main 2018 — Magnetic Properties of Matter Question with Solution
JEE Main 2018 (15 Apr Shift 1 Online)
Question
The B-H curve for a ferromagnet is shown in the figure. The ferromagnet is placed inside a long solenoid with 1000 turns/cm.. The current that should be passed in the solenoid to demagnetize the ferromagnet completely is:
Choose an option
Show full solutionCorrect option: B
Correct answer
B
Step-by-step explanation
Given Number of turns, turns turns Coercivity of ferromagnet, Current to demagnetise the ferromagnet,
Using,
or,
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This is a previous-year question from JEE Main 2018, covering the Magnetic Properties of Matter 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.