In today's world, Magnetic energy has become a topic of great relevance and interest to a wide spectrum of society. From its impact on the global economy to its influence on people's daily lives, Magnetic energy has sparked debates and discussions in different areas. In order to understand this phenomenon more deeply, it is essential to analyze its different dimensions and repercussions. In this article, we will explore the many facets of Magnetic energy and its relevance today, as well as the future perspectives it raises.
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The potential magnetic energy of a magnet or magnetic moment in a magnetic field is defined as the mechanical work of the magnetic force on the re-alignment of the vector of the magnetic dipole moment and is equal to:
Energy is also stored in a magnetic field. The energy per unit volume in a region of space of permeability containing magnetic field is:
More generally, if we assume that the medium is paramagnetic or diamagnetic so that a linear constitutive equation exists that relates and the magnetization , then it can be shown that the magnetic field stores an energy of
For a magnetostatic system of currents in free space, the stored energy can be found by imagining the process of linearly turning on the currents and their generated magnetic field, arriving at a total energy of: