Match List-I with List-II regarding the magnetic susceptibility ( ) and relative permeability ( μ_r ) of various materials. List-I List-II (A) Superconductor (I) -1 (B) Diamagnetic material (II) = -1 and μ_r = 0 (C)

Question

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Correct answer: D. (A)-(II), (B)-(I), (C)-(IV), (D)-(III)

Superconductors exhibit the Meissner effect, acting as perfect diamagnets, so

\chi = -1

and

\mu_r = 0

.

Normal diamagnetic materials have a small negative susceptibility, so

-1 < \chi < 0

and

0 < \mu_r < 1

.

Paramagnetic materials have a small positive susceptibility, so

0 < \chi < \epsilon

and

\mu_r > 1

.

Ferromagnetic materials have a very large positive susceptibility, so

\chi \gg 1

and

\mu_r \gg 1

.

Therefore, the correct matching is (A)-(II), (B)-(I), (C)-(IV), (D)-(III).

Answer: (A)-(II), (B)-(I), (C)-(IV), (D)-(III)

List-I	List-II
(A) Superconductor	(I) $-1 < \chi < 0$ and $0 < \mu_r < 1$
(B) Diamagnetic material	(II) $\chi = -1$ and $\mu_r = 0$
(C) Paramagnetic material	(III) $\chi \gg 1$ and $\mu_r \gg 1$
(D) Ferromagnetic material	(IV) $0 < \chi < \epsilon$ and $\mu_r > 1$ (where $\epsilon$ is a small positive number)

Match List-I with List-II regarding the magnetic susceptibility ( )...

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