Magnetic Properties Of Materials

Magnetic Susceptibility

Magnetic susceptibility ( ) measures the extent to which a material becomes magnetized when exposed to a magnetic field. The sign of the magnetic susceptibility indicates the type of magnetic material:

• Paramagnetic materials: These materials have a small positive magnetic susceptibility and are weakly attracted to magnetic fields.
• Ferromagnetic materials: These materials have a large positive susceptibility and exhibit strong attraction to magnetic fields.
• Diamagnetic materials: These materials have a negative magnetic susceptibility, meaning they are weakly repelled by magnetic fields.

Since the question asks about negative magnetic susceptibility, the correct answer is that it is found in diamagnetic materials only.

To solve the problem of matching List I with List II, we need to understand the magnetic susceptibility (χ) values typical for each type of material listed in List I.

1. Diamagnetic materials generally show a negative susceptibility close to zero, typically in the range of 0 > χ ≥ –1.

2. Ferromagnetic materials have very high susceptibility values where χ >> 1 due to their strong magnetic ordering.

3. Paramagnetic materials have small positive susceptibility values; therefore, the associated range for susceptibility would be 0 < χ < ε where ε is a small positive number.

4. Non-magnetic materials are neutral and have negligible susceptibility, typically represented as χ = 0.

Based on this understanding, the correct matching is:

A-II: Diamagnetic materials have a susceptibility of 0 > χ ≥ –1.

B-III: Ferromagnetic materials have a susceptibility of χ >> 1.

C-IV: Paramagnetic materials have a susceptibility in the range of 0 < χ < ε.

D-I: Non-magnetic materials have a susceptibility of χ = 0.

The correct option is thus: A-II, B-III, C-IV, D-I