When the temperature of a ferromagnetic material is increased above curie temperature then

Question

Question

This question was previously asked in

Airforce Group X 6 November 2020 Memory Based Paper

Answer 1

CONCEPT:

Ferromagnetic materials:

In some materials, the permanent atomic magnetic moments have a strong tendency to align themselves even without any external field.
These materials are called ferromagnetic materials.
In every unmagnetized ferromagnetic material, the atoms form domains inside the material.
Different domains, however, have different directions of magnetic moment and hence the materials remain unmagnetized.
On applying an external magnetic field, these domains rotate and align in the direction of the magnetic field.

EXPLANATION:

Beyond curie temperature, ferromagnetic material turns into paramagnetic material, as if ferromagnetic domains become random. Therefore option 1 is correct.