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Ferromagnetism

Iron is ferro...

Question

Iron is ferromagnetic :

A

at all temperatures

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B

at NTP only

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C

above

770^{o} C

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D

below

770^{o} C

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Solution

The correct option is C below $770^{o} C$
Curie temperature for iron is 770 degree centigrade therefore, it behaves as a ferromagnetic material below 770 and above 770 it becomes paramagnetic.

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