Which materials have negative value of magnetic susceptibility?

Which material have negative value of magnetic susceptibility?

Which of the following has negative magnetic susceptibility ?

What is relative permeability of a magnetic material? How is it related to the magnetic susceptibility?

Relative permeability of a material, mu, = 0.5 . Identify the nature of the magnetic material and write its relation to magnetic susceptibility.

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

which of the following substances have a positive permeability and a negative magnetic susceptibility