Question
Distinguish between diamagnetic and ferromagnetic materials in respect of their (i) intensity of magnetisation, (ii) behaviour in a non-uniform magnetic field and (iii) susceptibility.
Solution
(i) Intensity of magnetisation is a small negative value for diamagnetic substance and, large positive value for a ferromagnetic substance.
(ii) In a non-uniform magnetic field, a diamagnetic substance tends to move from stronger to weaker part while the ferromagnetic substance tends to move from weaker to stronger part of the field.
(iii) For a diamagnetic substance, susceptibility is small negative value while, for a ferromagnetic substance, susceptibility is large positive value.
