Everything about Point Charge totally explained
A
point charge is an idealized model of a particle which has an
electric charge. A point charge is an electric charge at a
mathematical point with no dimensions.
The fundamental
equation of
electrostatics is
Coulomb's law, which describes the electric force between two point charges. The
electric field associated with a classical point charge increases to infinity as the distance from the point charge decreases towards zero making energy (thus mass) of point charge infinite. In
quantum electrodynamics, developed in part by
Richard Feynman, the mathematical method of renormalization eliminates the infinite divergence of the point charge.
Earnshaw's theorem states that a collection of point charges can't be maintained in an
equilibrium configuration solely by the electrostatic interaction of the charges.
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