Question

Curie temperature is the temperature above which

• A. paramagnetic material becomes ferromagnetic material
• B. ferromagnetic material becomes diamagnetic material
• C. ferromagnetic material becomes paramagnetic material
• D. paramagnetic material becomes diamagnetic material

Answer 1

Answer: (C)

ferromagnetic material becomes paramagnetic material

Answer 2

Curie temperature is the temperature above which ferromagnetic material becomes paramagnetic material.

Curie Temperature is defined as the temperature at which certain materials lose their permanent magnetic properties, and are replaced by induced magnetism. Above this temperature, the paramagnetic substance obeys Curie Weiss law, even those resistances which are not ferromagnetic but only paramagnetic also obey Curie Weiss law above the Curie temperature only. Meaning, it is the temperature above which a ferromagnetic material becomesparamagnetic. In the case of rocks and minerals, remanent magnetism goes below the Curie point — about 570 °C (1,060 °F) for the common magnetic mineral magnetite.

Hence, the correct answer is option C.

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