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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