Curie temperature of iron is the temperature below which it is
Correct answer: B. Ferromagnetic
- A. Superconducting
- B. Ferromagnetic
- C. Low retentivity
- D. Both (a) and (c)
Explanation
The Curie temperature is the temperature above which a ferromagnetic material loses its permanent magnetic properties and becomes paramagnetic. For iron, this temperature is about 770°C (1043 K). Below this temperature, iron is ferromagnetic, meaning it can retain its magnetic properties. Superconductivity is unrelated to the Curie temperature of iron, and low retentivity would imply a lack of ability to maintain magnetisation, which is not the case for iron below its Curie temperature.
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Solids are compared through crystal structure, amorphous arrangement, elasticity, plastic deformation, stress, strain and Young’s modulus. Electrical behavior depends on available charge carriers and band structure, so conductors, insulators and semiconductors must be distinguished from mechanical properties such as strength, stiffness and brittleness.
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