Magnetic energy

Magnetic energy is energy associated with a magnetic field, including energy stored in the field and changes in that energy when currents or magnetic materials move.

Magnetic energy density: The energy stored per unit volume in a magnetic field; in vacuum it equals the field strength squared divided by twice the vacuum permeability. It quantifies how magnetic energy is distributed through space.
Inductor: A circuit component designed to store energy in a magnetic field when current flows through it. Its stored energy is a direct practical instance of magnetic energy.
Magnetic field: A physical field that exerts forces on moving electric charges and magnetic materials. Magnetic energy is assigned to this field and its configuration.
Electric field energy: Energy stored in an electric field, with density proportional to the field strength squared in a linear medium. It is the electric counterpart to energy stored in a magnetic field.
Magnetic flux: A measure of the magnetic field passing through a specified surface. Changing flux links field changes to induced electrical effects.
Transformer: An electrical device that transfers energy between circuits through changing magnetic flux. Its magnetic core and fields mediate energy transfer between windings.
Electromagnetic field: A coupled electric and magnetic field that carries energy and momentum through space. Magnetic energy is one part of the broader electromagnetic energy.
Kinetic energy: Energy associated with the motion of an object or particle. Mechanical motion can exchange energy with magnetic fields without magnetic forces doing work on point charges.
Faraday's law of induction: The law stating that changing magnetic flux induces an electromotive force around a loop. It describes how magnetic energy can be converted into electrical energy.
Magnetic energy storage: The storage of electrical energy in magnetic fields, commonly using superconducting coils. Superconducting coils retain substantial magnetic energy with low resistive losses.

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Solar flareNarrower topic: A flare releases magnetic energy accumulated in the Sun’s atmosphere.