Question

The curie law, X = C/T, expressing susceptibility X varying with absolute temperature T, is obeyed by:
1. Both ferromagnetic and paramagnetic materials
2. Ferromagnetic materials only
3. Paramagnetic materials only
4. Diamagnetic materials only

Answer 1

Correct Answer - Option 3 : Paramagnetic materials only

• According to Curie’s Law, the magnetization in a paramagnetic material is directly proportional to the applied magnetic field.
• If the object is heated, the magnetization is viewed to be inversely proportional to the temperature.
• The law was discovered by the French physicist, Pierre Curie.

 

For a fixed value of the field, the magnetic susceptibility (χ) is inversely proportional to temperature, i.e.

M = χ H, with 

\(χ =\frac{C}{T}\)

χ = Magnetic Susceptibility

M = Magnitude of resulting magnetization

H = Magnitude of the applied magnetic field

T = Absolute temperature, measured in kelvins (K)

C = Material-specific Curie constant (K).