# 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 | + | 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> | + | <center> [[File:Conintr.gif]] <b>E</b>[[File:Middot.gif]]''d''<b>I</b>=–∂[[File:Fgr.gif]]/∂''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> | + | <center>[[File:Nabla.gif]]×<b>E</b>=–∂<b>B</b>/∂''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 cutting the loop (d**I** is a length element of the loop):

**E**

*d*

**I**=–∂/∂

*t*.

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

**E**=–∂

**B**/∂

*t*.