JEE Main 2019PhysicsMagnetic Properties of MatterEasyMCQ

JEE Main 2019 — Magnetic Properties of Matter Question with Solution

JEE Main 2019 (12 Jan Shift 2)

Question

A paramagnetic material has 1028 atoms m-3. Its magnetic susceptibility at temperature 350 K is 2.8×10-4. Its susceptibility at 300 K is

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Show full solutionCorrect option: C
Correct answer
C3.267x10-4

Step-by-step explanation

From Curie's law, the magnetic susceptibility is inversely proportional to the temperature, i.e.,

χ∝1T

Hence, the ratio of magnetic susceptibility at different temperature T1=350 K and T2=300 K.

χ2χ1=T1T2

χ2=χ1×T1T2=2.8×10-4×350300

χ2=3.267×10-4.

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About this question

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.