JEE Main · 2021 · 01 Sep 2021 · Shift 2 · Magnetic Properties of Matter

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Following plots show Magnetization (M) vs Magnetising field (H) and Magnetic susceptibility (χ) vs temperature (T) graph:

Which of the following combination will be represented by a diamagnetic material?

(A)(b), (c)
(B)(b), (d)
(C)(a), (c)✓ Correct
(D)(a), (d)

Answer: (C)

Solution

A diamagnetic sample is weakly magnetised opposite to the applied field, so its

M

–

H

graph is a straight line of small negative slope. Its susceptibility is negative and independent of temperature, so its

χ

–

T

graph is a horizontal line lying below the axis. The diamagnetic combination is the plot with

M

falling linearly with

H

together with the plot of constant negative

χ

JEE Main · 2021 · 01 Sep 2021 · Shift 2 · Single correct option

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