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Electric field
Electromagnetism 

Electricity · Magnetism 
An electric field is a vector field that shows the direction that a positively charged particle will move when placed in the field. More precisely, if a particle has an electric charge [math]q[/math] and is in an electric field [math]\vec{E}[/math], the electric force the charge will feel is [math]\vec{F}=q\cdot \vec{E}[/math] .Electric fields are produced around objects that have electrical charge, or by a magnetic field that changes with time. Electric field lines are used to represent the influence of electric field. ^{[1]} The idea of an electric field was first made by Michael Faraday.^{[2]}
Electric fields are caused by electric charges, described by Gauss's law,^{[3]} or varying magnetic fields, described by Faraday's law of induction.^{[4]} The equations of both fields are coupled and together form Maxwell's equations that describe both fields as a function of charges and currents.^{[5]}
References
 ↑ Richard Feynman (1970). The Feynman Lectures on Physics Vol II. Addison Wesley Longman. . http://www.feynmanlectures.caltech.edu/II_04.html.
 ↑ "Michael Faraday". http://public.wsu.edu/~jtd/Physics206/michael_faraday.htm. Retrieved 20150630.
 ↑ Purcell, p 25: "Gauss's Law: the flux of the electric field E through any closed surface... equals 1/e times the total charge enclosed by the surface."
 ↑ Purcell, p 356: "Faraday's Law of Induction."
 ↑ Purcell, Edward & Morin, David 2013. Electricity and magnetism. 3rd ed, Cambridge University Press. New York. ISBN 9781107014022
