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Curie temperature is the temperature above which:

1. paramagnetic material becomes ferromagnetic material
2. ferromagnetic material becomes diamagnetic material
3. ferromagnetic material becomes paramagnetic material
4. paramagnetic material becomes diamagnetic material

Correct answer: ferromagnetic material becomes paramagnetic material

Solution

The Curie temperature is the critical temperature at which a ferromagnetic substance loses its permanent magnetization. Above it, the aligned magnetic domains break down and the material behaves as a paramagnet.

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