Electrostatics

Electrostatics is the branch of physics that deals with the force exerted by a static (i.e. unchanging) electric field upon a charged object.

Characteristics

As with hydrostatics and the Statics portion of classical mechanics, the actual situation need not be static and unchanging. Instead static implies that the dynamic portion is being ignored, and we analyze frozen snapshots of the situation. In Electrostatics we study e-fields, voltage, and charge but ignore any currents and magnetism which may also be present. Because of its relationship and interaction with magnetism, the two fields are often combined as electromagnetism.

Coulomb's law

The fundamental equation of electrostatics is Coulomb's law, which describes the force between two point charges: : $F\; =\; \backslash \backslash frac\{\backslash \backslash left|q\_1\; q\_2\backslash ight\{4\; \backslash \backslash pi\; \backslash \backslash epsilon\_0\; r^2\}$

Electric potential

Electric potential (also known as voltage) is another common and significant topic in electrostatics. Poisson's equation gives the relationship between charge distribution and potential: :$\{\backslash \; abla\}^2\; V\; =\; -\; \{\backslash ho\; \backslash \backslash over\; \backslash \backslash epsilon\_0\}$

See also

• electromagnetism
• static electricity
• Electrostatic force

de:Elektrostatik fr:Électrostatique it:Elettrostatica sl:Elektrostatika

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