Equipotential

An equipotential of a field (gravitational, electric, etc) is the place where the potential (from which the field derives) is the same one. It is important to understand well that on equipotential it is not the field which is uniform, but the potential. If the space variation (i.e. the gradient) of the potential is important, then the field is intense. For example, in a Keplerian field, the equipotential ones are spheres. There exist many models of potential to describe objects like the globular clusters, the galaxies, etc the Geoid is equipotential terrestrial field of Pesanteur .

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