File:Electrostatic induction.svg

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Original file (SVG file, nominally 951 × 652 pixels, file size: 38 KB)

Captions

Captions

Diagram showing how electrostatic induction works

Summary

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Description
English: Diagram of electric charges induced in conductive objects (shapes) by the electrostatic field (lines with arrows) of a nearby charge (+), due to electrostatic induction.
An electric charge near a metal object causes the mobile charges in the metal to separate. If the external charge is positive as shown, negative charges (blue) are attracted and move to the surface of the object facing the external charge, positive charges (red) are repelled and move to the surface of the object facing away. This charge separation quickly reaches an equilibrium and stops when the induced surface charges are exactly the right size and shape so their opposing electric field cancels the external electric field throughout the interior of the metal. Therefore electrostatic field lines cannot penetrate conductive objects; they always end on induced charges on the surface, and the interior of a conductive object is at a constant electrostatic potential. The drawing also illustrates that electric field lines at a metal surface are always normal (perpendicular) to the surface except at sharp corners, and induced charge tends to collect at sharp edges and points
This is a computed drawing and the distribution of the electostatic field lines and charges shown is quantitatively accurate.
Date
Source Own work
Author Chetvorno
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Licensing

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Public domain I, the copyright holder of this work, release this work into the public domain. This applies worldwide.
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I grant anyone the right to use this work for any purpose, without any conditions, unless such conditions are required by law.

File history

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Date/TimeThumbnailDimensionsUserComment
current12:12, 15 December 2020Thumbnail for version as of 12:12, 15 December 2020951 × 652 (38 KB)Geek3 (talk | contribs)Computed shape of fieldlines
03:51, 29 June 2013Thumbnail for version as of 03:51, 29 June 2013951 × 652 (151 KB)Chetvorno (talk | contribs)Corrected error in drawing of electric field lines. Electric field lines cannot originate and end on same conductive body (forming loop)
05:40, 12 October 2010Thumbnail for version as of 05:40, 12 October 2010951 × 652 (174 KB)Chetvorno (talk | contribs){{Information |Description={{en|Diagram of electric charges induced in metal objects by the electric field of a nearby charge, due to Wikipedia:Electrostatic induction}} |Source={{own}} |Date= 2010-10-11 |Author=Chetvorno |Per

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