# Negative susceptibility of diamagnetic materials

Susceptibility comes from the word “susceptible” means the easily affected. As I have discussed earlier that lines of force are expelled or repelled from diamagnetic materials, when these materials are placed in external magnetic field. It means diamagnetic materials are not effected by the field. Therefore the susceptibility of diamagnetic materials is negative.

Analytical Reason:

As we have discussed in the earlier articles, that relative permeability of diamagnetic materials is lesser than 1 and  also there is a relation between relative permeability (μr)and susceptibility (χ):

μr = 1 + χ

where is μr

or χ = μr – 1

and μr is less than 1

therefore, χ is negative