Question

Distinguish between 'paramagnetic' and 'ferromagnetic' substances.

Answer 1

Paramagnetic	Ferromagnetic
Substances which are weakly attracted by a magnet are called paramagnetic substances	Substances which are strongly attracted by a magnet are called ferromagnetc substances
Paramagnetic materials loose their magnetism on removal of the external field and hence cannot be used to make permanant magnets	Ferromagnetic materials retain their magnetism on removal of the external field and hence can be used to make permanant magnets
The susceptibilty is positive but small.	The susceptibilty is positive but very high.
In the absence of electric field, the net dipole moment is zero	In the absence of electric field, the net dipole moment is non-zero
Aluminium,manganese,chromium and platinum are some examples of paramagnetic substances.	Iron,nickel,cobalt,gadolinium,dysprosium and their alloys are some examples of ferromagnetc substances