Torque on a Magnetic Dipole
A magnetic dipole consists of two unlike poles of equal strength and separated by a
small distance. For example, a bar magnet, a compass needle etc. are the magnetic
dipoles. We shall show that a current loop behaves as a magnetic dipole. An atom of a
magnetic material behaves as a dipole due to the electrons revolving around the
nucleus. Magnetic dipole moment is defined as the product of pole strength and the
distance between the two poles.