Question

Define potential energy in magnetic field.

Answer 1

A magnetic dipole moment  in a magnetic field  will possess potential energy  which depends upon its orientation with respect to the magnetic field. Since magnetic sources are inherently dipole sources which can be visualized as a current loop with current I and area A, the energy is usually expressed in terms of the magnetic dipole moment. The energy  possessed by magnetic dipole moment is known as magnetic potential energy.

Answer 2

The potential energy of a magnet ofmagnetic moment in a magnetic fieldis defined as the mechanical work of the magnetic force (actually magnetictorque) on the re-alignment of the vector of the Magnetic dipole moment and is equal to: ... Energy is also stored in a magnetic field.