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Electrostatics

From Academic Kids

Electricity
Magnetism
Electrostatics
Electric charge
Coulomb's law
Electric field
Gauss's law
Electric potential
Electric current
Ampere's law
Magnetic field
Magnetic moment
Lorentz force law
Electromotive force
Electromagnetic induction
Faraday-Lenz law
Displacement current
Maxwell's equations
Electromagnetic field
Electromagnetic radiation
Electrical conduction
Electrical resistance
Capacitance
Inductance
Impedance
Resonant cavities
Waveguides

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

Contents

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:

<math>F = \frac{\left|q_1 q_2\right|}{4 \pi \epsilon_0 r^2}<math>

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:

<math>{\nabla}^2 V = - {\rho \over \epsilon_0}<math>

See also

fr:lectrostatique id:Elektrostatik it:Elettrostatica pl:Elektrostatyka ru:Электростатика sl:Elektrostatika nl:Elektrostatica

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