Difference between revisions of "Dictionary:Electric field"

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{{lowercase}}{{#category_index:E|electric field}}
 
{{lowercase}}{{#category_index:E|electric field}}
A spatial vector quantity equal to a potential gradient, produced by charged bodies or a time-varying magnetic field. Unit is volts per meter. The electric field <b>E</b> induced in a loop equals the negative time derivative of the magnetic flux '' cutting the loop (d<b>I</b> is a length element of the loop):  
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A spatial vector quantity equal to a potential gradient, produced by charged bodies or a time-varying magnetic field. Unit is volts per meter. The electric field <b>E</b> induced in a loop equals the negative time derivative of the magnetic flux [[File:Fgr.gif]] cutting the loop (d<b>I</b> is a length element of the loop):  
  
<center> '' <b>E</b>''''d''<b>I</b>=&#x2013;&#x2202;''/&#x2202;''t''.</center>
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<center> [[File:Conintr.gif]] <b>E</b>[[File:Middot.gif]]''d''<b>I</b>=&#x2013;&#x2202;[[File:Fgr.gif]]/&#x2202;''t''.</center>
  
  
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It is also expressed in terms of the change in the magnetic induction <b>B</b> with time ''t'':  
 
It is also expressed in terms of the change in the magnetic induction <b>B</b> with time ''t'':  
  
<center>''&#x00D7;<b>E</b>=&#x2013;&#x2202;<b>B</b>/&#x2202;''t''.</center>
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<center>[[File:Nabla.gif]]&#x00D7;<b>E</b>=&#x2013;&#x2202;<b>B</b>/&#x2202;''t''.</center>

Revision as of 10:54, 18 January 2012

A spatial vector quantity equal to a potential gradient, produced by charged bodies or a time-varying magnetic field. Unit is volts per meter. The electric field E induced in a loop equals the negative time derivative of the magnetic flux Fgr.gif cutting the loop (dI is a length element of the loop):

Conintr.gif EMiddot.gifdI=–∂Fgr.gif/∂t.


It is also expressed in terms of the change in the magnetic induction B with time t:

Nabla.gif×E=–∂B/∂t.