Question

Iron is ferromagnetic

• A. at all temperatures
• B. at NTP only
• C. above 770?C
• D. below 770?C

Answer 1

Answer: (D)

Curie temperature of iron is $770{}^{\circ }C$ . So, below $770{}^{\circ }C$ , it is ferromagnetic and above $770{}^{\circ }C$ it is paramagnetic.