JEE Main 2019 — Magnetic Properties Of Matter Question with Solution
From: JEE Main 2019 (Online) 9th January Morning Slot
Question
A bar magnet is demagnetized by inserting it inside a solenoid of length 0.2 m, 100 turns, and carrying a current of 5.2 A. The corecivity of the bar magnet is :
Choose an option
Show full solutionCorrect option: B
Correct answer
B2600 A/m
Step-by-step explanation
Coercivity, H =
Inside solenoid the magnetic field,
B = 0ni
H =
= ni
=
=
= 2600 A/m
Inside solenoid the magnetic field,
B = 0ni
H =
= ni
=
=
= 2600 A/m
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This is a previous-year question from JEE Main 2019, 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.