A ferromagnetic material is heated above its Curie temperature. Which ...
Explanation:
Ferromagnetic materials are materials that exhibit a strong magnetic behavior due to the alignment of their atomic spins in specific directions. This alignment gives rise to the formation of ferromagnetic domains, which are regions within the material where the spins are all pointing in the same direction.
When a ferromagnetic material is heated above its Curie temperature, which is the temperature at which it loses its magnetic properties, the following changes occur:
Disrupting the Alignment
The thermal energy provided by the heat disrupts the alignment of the atomic spins in the material, causing them to become disordered. As a result, the ferromagnetic domains become randomized, and the material loses its magnetic behavior.
Loss of Magnetic Properties
The loss of magnetic properties occurs because the randomization of the ferromagnetic domains prevents the formation of a net magnetic field in the material. Without a net magnetic field, the material cannot exhibit the strong magnetic behavior characteristic of ferromagnetic materials.
Formation of Diamagnetic Properties
The loss of magnetic properties in a ferromagnetic material when heated above its Curie temperature causes it to change into a diamagnetic material. Diamagnetic materials are materials that exhibit a weak repulsion to magnetic fields.
Conclusion:
Therefore, option B is the correct statement because when a ferromagnetic material is heated above its Curie temperature, the ferromagnetic domains become random, disrupting the alignment of atomic spins in the material. This causes the loss of magnetic properties, and the material changes into a diamagnetic material.