Answer the following questions:
The earth’s core is known to contain iron. Yet geologists do not regard this as a source of the earth’s magnetism. Why?
The earth’s core contains iron in molten state which is not ferromagnetic in nature hence geologists do not regard this as a source of earth’s magnetism.
Fact: After Curie temperature (Tc) materials lose permanent magnetism. This is due to inability is magnetic domains to align properly. After this temperature magnetic materials attain paramagnetic nature.