Question

Arrange the following in decreasing order:
A. Net magnetization in ferromagnets,
B. Net magnetization in ferrimagnets,
C. Net magnetization in anti-ferromagnets,
D. Net magnetization in paramagnets.

• A. C \(>\) B \(>\) D \(>\) A
• B. B \(>\) C \(>\) A \(>\) D
• C. A \(>\) B \(>\) C \(>\) D
• D. A \(>\) C \(>\) B \(>\) D

Hint:

Ferromagnets show very high net magnetization, while paramagnets show weak magnetization.

Answer 1

The Correct Option is C

Concept:
Magnetization depends on the alignment of magnetic moments in a material.

Step 1: Ferromagnets.
In ferromagnetic materials, magnetic moments align parallel to each other. Thus, net magnetization is very high. \[ A \text{ is highest} \]

Step 2: Ferrimagnets.
In ferrimagnetic materials, opposite magnetic moments are unequal, so some net magnetization remains. \[ B \text{ comes after } A \]

Step 3: Anti-ferromagnets.
In anti-ferromagnetic materials, opposite magnetic moments nearly cancel each other. \[ C \text{ is very small} \]

Step 4: Paramagnets.
Paramagnetic materials have weak magnetization only in an external field. \[ D \text{ is lowest in the given order} \] Therefore: \[ A>B>C>D \] \[ \therefore \text{Correct Answer is (C)} \]