Magnetic Properties Of Materials

Diamagnetic materials have a tendency to develop a magnetic moment opposite to the applied magnetic field.
Hence, their magnetic susceptibility ( ) is negative.
On the other hand, paramagnetic and ferromagnetic materials have positive susceptibilities.

Magnetic field at the center of a circular loop carrying current is given by: If the same wire is bent into turns (i.
e.
, a coil), the magnetic field at the center becomes: Hence, the magnetic field becomes times the original field .