Question

Substances in which the magnetic moment of a single atom is not zero, is known as 

(a) Diamagnesitm

(b) Ferromagnetism

(c) Paramagnetism

(d) Ferrimagnetism

Answer 1

Correct option is (c) Paramagnetism

Paramagnetic substance have magnetic moment of a single atom is not zero becuse paramagnetic substance atom of electron spining in same direction.

Ferromagnetic substance whose atom have an excess as electron in random direction. So a single atom of ferromagnetic substance have zero magnetic moment.