NEETPhysicsMagnetic Properties of Matter
Match List-I with List-II regarding the magnetic susceptibility ( ) of various materials and its dependence on absolute temperature ( T ). List-I List-II (A) Diamagnetic material (I) 1 T-T_c (B) Paramagnetic material (II) = -1 (C) Ferromagnetic material ( T > T_c ) (III) is small, negative and independent of T (D) Superconductor (IV) 1 T Choose the correct answer from the options given below:
Options
- A(A)-(II), (B)-(IV), (C)-(I), (D)-(III)
- B(A)-(III), (B)-(I), (C)-(IV), (D)-(II)
- C(A)-(IV), (B)-(III), (C)-(II), (D)-(I)
- D(A)-(III), (B)-(IV), (C)-(I), (D)-(II)
Correct answer
D. (A)-(III), (B)-(IV), (C)-(I), (D)-(II)
Step-by-step solution
Diamagnetic materials have a small, negative susceptibility that is practically independent of temperature. Thus, (A) matches with (III). Paramagnetic materials obey Curie's law, where susceptibility is inversely proportional to absolute temperature ( 1 T ). Thus, (B) matches with (IV). Ferromagnetic materials above their Curie temperature ( T_c ) become paramagnetic and obey the Curie-Weiss law ( 1 T-T_c ). Thus, (C) matches with (I). Superconductors exhibit the Meissner effect, acting as perfect diamagnets with a