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Magnetic energy and electric energy are related by Maxwell's equations. The potential energy of a magnet of magnetic moment m in a magnetic field B is defined as the mechanical work of magnetic force (actually of magnetic torque) on re-alignment of the vector of the magnetic dipole moment, and is equal: :: while the energy stored in an inductor (of inductance ''L'') when current ''I'' is passing via it is ::. This second expression forms the basis for superconducting magnetic energy storage. Energy is also stored in a magnetic field. The energy per unit volume in a region of space of permeability containing magnetic field B is: :: If the magnetic field is an area in the x,y directions, then 3D fundamental magnoflux energy may be formed by applying a voltage at right angles in the z direction. ==External links== * (Magnetic Energy ), Richard Fitzpatrick Professor of Physics The University of Texas at Austin. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Magnetic energy」の詳細全文を読む スポンサード リンク
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