Question

On heating a ferromagnetic substance above Curie temperature
1. becomes paramagnetic
2. becomes diamagnetic
3. remains ferromagnetic with constant magnetic susceptibility
4. becomes electromagnetic

Answer 1

Correct Answer - Option 1 : becomes paramagnetic

CONCEPT:

• Curie Temperature: It is the temperature at which a magnetic material undergoes a sharp change in its magnetic properties.
  • Above this temperature, some materials lose their magnetism.
    • Above this temperature, ferromagnetic material becomes paramagnetic.

EXPLANATION:

• When a ferromagnetic material is heated to Curie temperature, it disrupts the arrangements of the molecules and a weak magnetic behavior remains.
• This weak magnetic behavior is called Paramagnetic.
• Above this temperature, the paramagnetism property also decreases.
• Upon cooling, it regains its ferromagnetic behavior.
• So the correct answer is option 1.