RegisterElementary loop, magnetic dipoleIn every atom, electrons move around the kernel. This movement of electrons along orbits can be imagined as a current loop, flowing by current I. Since electrons in motion create magnetic field, effects of the elementary current loop can be described by the moment of magnetic dipole where dS is the vector of the surface bounded by the current loop. In ferromagnetic, external magnetic field causes such skewing of current loops so that moments of magnetic dipole approach the direction of the external magnetic induction. That way, the external field is amplified inside the ferromagnetic. Elementary loop can be considered as the simplest loop antenna (elementary magnetic dipole). Back
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