Magnetic Properties Of Materials

The relation between relative permeability and magnetic susceptibility is: Given:

Magnetic permeability is the measure of how a material responds to a magnetic fiel(D) For different types of materials, the value of varies:
- In vacuum, the magnetic permeability is (constant) and is equal to .
- For ferromagnetic materials, is much greater than 1.
- For paramagnetic materials, is slightly greater than 1.
- For diamagnetic materials, is slightly less than 1.
Since paramagnetic substances have a weak attraction to a magnetic field, their permeability is just slightly greater than 1. This is why the correct answer is .
Thus, the magnetic permeability of a paramagnetic substance is greater than 1.