S is the surface of a lump of magnetic material.

Magnetic Materials

The magnetic induction and magnetising field intensity in a sample of magnetic material are B and H respectively . The magnetic susceptibility of the material is

Mention the classification of magnetic materials

The permeability of magnetic material is 0.9983. Name the type of magnetic materials it represents.

A susceptibility of a certain magnetic material is 400. What is the class of the magnetic material ?