![]() ![]() An external magnetic field, produced by an electromagnet, will exert a force on other magnets placed in the vicinity of the magnet producing the field this effect is known as magnetic induction. The term "magnetic field" is used for two distinct but closely related fields denoted by the symbols and. A magnetic field is a physical field produced by magnets.In addition to moving charges produce magnetic fields static distributions of charges and currents also produce magnetic fields. ![]() The movement of a charge in an external magnetic field produces a force on it, according to the Lorentz force law.For humans and other land-based life forms, it manifests in the aurora borealis, or northern lights (aurora australis, or southern lights, also occur but are not as visible to the naked eye). ![]()
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