5.1 Determine the torque on a magnetic moment by a region of magnetic field.
5.2 Based on 5.1 and your electrostatics knowledge, derive the potential energy function for the magnetic moment in an external magnetic field.
From your result in 5.2, we note that we are able to define a potential energy for the magnetic moment in a region of magnetic field. It has to be emphasised here that this is different from the scalar potential energy that arises from a irrotational vector field, but rather as a means of describing the stability of the magnetic moment within the magnetic field.
6. Inductance
Faraday-Lenz Law describes the electromotive force induced by a changing current: