Question

Iron loses magnetic property at:

• A. melting point
• B. $1000K$
• C. curie point
• D. boiling point

Answer 1

The correct option is C curie point

Curie point, also called Curie Temperature, the temperature at which certain magnetic materials undergo a sharp change in their magnetic properties. In the case of rocks and minerals, remanent magnetism appears below the Curie point—about ${570}^{\circ }C$ for the common magnetic mineral magnetite.

Below the Curie point—for example, ${770}^{\circ }C$ for iron—atoms that behave as tiny magnets spontaneously align themselves in certain magnetic materials.

In ferromagnetic materials, such as pure iron, the atomic magnets are oriented within each microscopic region (domain) in the same direction, so that their magnetic fields reinforce each other.

Option C is correct.