Electric field - Revision history

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energy>Jmdonev at 19:49, 17 February 2020

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	<onlyinclude>The '''electric field''' is one of the fundamental results of [[electromagnetic force\|electromagnetism]], created by a static (stationary) charge, or by a dynamic (changing in time) [[magnetic field]]</onlyinclude>. An electric field is defined as the [[force]] per unit charge, given by the equation:		<onlyinclude>The '''electric field''' is one of the fundamental results of [[electromagnetic force\|electromagnetism]], created by a static (stationary) charge, or by a dynamic (changing in time) [[magnetic field]]</onlyinclude>. An electric field is defined as the [[force]] per unit charge, given by the equation:

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	where <math>q</math> is the [[charge]] in [[coulomb]]s (C). Thus, when a charge is in the presence of an electric field it experiences a force causing the charged particle to move, which is given by rearranging the equation above so that:		where <math>q</math> is the [[charge]] in [[coulomb]]s (C). Thus, when a charge is in the presence of an electric field it experiences a force causing the charged particle to move, which is given by rearranging the equation above so that:

	::<math>F=qE</math>.<ref>R. Chabay and B. Sherwood, "The Electric Field of a Dipole," in Matter & Interactions, 3rd ed., Hoboken, NJ: Wiley, 2011, ch.14, sec.6, pp. 556-560</ref>		::<math>\vec{F}=q\vec{E}</math>.<ref>R. Chabay and B. Sherwood, "The Electric Field of a Dipole," in Matter & Interactions, 3rd ed., Hoboken, NJ: Wiley, 2011, ch.14, sec.6, pp. 556-560</ref>

	The electric field can be looked at as analogous to a [[gravity\|gravitational field]] in many ways, as massive objects are pulled towards each other in the presence of one another, just as charges are. The forces associated with each field also both fall off by an [[inverse square law]], <math>1/r^2</math> in simple cases. For complex charge distributions the electric field can have quite a few different relationships, see the figure gallery below (for a more complete discussion please see [http://hyperphysics.phy-astr.gsu.edu/hbase/electric/elefie.html hyperphysics].		The electric field can be looked at as analogous to a [[gravity\|gravitational field]] in many ways, as massive objects are pulled towards each other in the presence of one another, just as charges are. The forces associated with each field also both fall off by an [[inverse square law]], <math>1/r^2</math> in simple cases. For complex charge distributions the electric field can have quite a few different relationships, see the figure gallery below (for a more complete discussion please see [http://hyperphysics.phy-astr.gsu.edu/hbase/electric/elefie.html hyperphysics].

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energy>Jmdonev at 21:34, 12 August 2018

2018-08-12T21:34:57Z

← Older revision		Revision as of 21:34, 12 August 2018
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	<onlyinclude>The '''electric field''' is one of the fundamental results of [[electromagnetic force\|electromagnetism]], created by a static (stationary) charge, or by a dynamic (changing in time) [[magnetic field]]</onlyinclude>. An electric field is defined as the [[force]] per unit charge, given by the equation:		<onlyinclude>The '''electric field''' is one of the fundamental results of [[electromagnetic force\|electromagnetism]], created by a static (stationary) charge, or by a dynamic (changing in time) [[magnetic field]]</onlyinclude>. An electric field is defined as the [[force]] per unit charge, given by the equation:

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	File:800px-VFPt_charges_plus_plus.svg.png\|Figure 3. An interaction of two positive electric field lines, shown to be repulsive.<ref>"VFPt charges plus plus" Licensed under CC BY-SA 3.0 via Wikimedia Commons - http://commons.wikimedia.org/wiki/File:VFPt_charges_plus_plus.svg#mediaviewer/File:VFPt_charges_plus_plus.svg</ref>		File:800px-VFPt_charges_plus_plus.svg.png\|Figure 3. An interaction of two positive electric field lines, shown to be repulsive.<ref>"VFPt charges plus plus" Licensed under CC BY-SA 3.0 via Wikimedia Commons - http://commons.wikimedia.org/wiki/File:VFPt_charges_plus_plus.svg#mediaviewer/File:VFPt_charges_plus_plus.svg</ref>
	</gallery>		</gallery>
			==For Further Reading==
			*[[Electrical energy]]
			*[[Force]]
			*[[Fundamental force]]
			*[[Electromagnetic force]]
			*Or explore a [[Special:Random\|random page]]

	==References==		==References==
	{{reflist}}		{{reflist}}
	[[Category:Uploaded]]		[[Category:Uploaded]]

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Jmdonev at 22:42, 11 January 2018

2018-01-11T22:42:21Z

← Older revision		Revision as of 22:42, 11 January 2018
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	[[Category:Done ~~2015~~-02-15]]		[[Category:Done 2017-12-31]]
	<onlyinclude>The '''electric field''' is one of the fundamental results of [[electromagnetic force\|electromagnetism]], created by a static (stationary) charge, or by a dynamic (changing in time) [[magnetic field]]</onlyinclude>. An electric field is defined as the [[force]] per unit charge, given by the equation <m>E=F/q</m>, where q is the [[charge]] in [[coulomb]]s (C). Thus, when a charge is in the presence of an electric field it experiences a force causing the charged particle to move, which is given by rearranging the equation above so that <m>F=qE</m>.<ref>R. Chabay and B. Sherwood, "The Electric Field of a Dipole," in Matter & Interactions, 3rd ed., Hoboken, NJ: ~~Wiley, 2011, ch.14, sec.6, pp. 556-560</ref>~~		<onlyinclude>The '''electric field''' is one of the fundamental results of [[electromagnetic force\|electromagnetism]], created by a static (stationary) charge, or by a dynamic (changing in time) [[magnetic field]]</onlyinclude>. An electric field is defined as the [[force]] per unit charge, given by the equation:

	The electric field can be looked at as analogous to a [[gravity\|gravitational field]] in many ways, as massive objects are pulled towards each other in the presence of one another, just as charges are. The forces associated with each field also both fall off by an [[inverse square law]], <m>1/r^2</m> in simple cases. For complex charge distributions the electric field can have quite a few different relationships, see the figure gallery below (for a more complete discussion please see [http://hyperphysics.phy-astr.gsu.edu/hbase/electric/elefie.html hyperphysics).		::<math>E=\frac{F}{q}</math>,

			where <math>q</math> is the [[charge]] in [[coulomb]]s (C). Thus, when a charge is in the presence of an electric field it experiences a force causing the charged particle to move, which is given by rearranging the equation above so that:

			::<math>F=qE</math>.<ref>R. Chabay and B. Sherwood, "The Electric Field of a Dipole," in Matter & Interactions, 3rd ed., Hoboken, NJ: Wiley, 2011, ch.14, sec.6, pp. 556-560</ref>

			The electric field can be looked at as analogous to a [[gravity\|gravitational field]] in many ways, as massive objects are pulled towards each other in the presence of one another, just as charges are. The forces associated with each field also both fall off by an [[inverse square law]], <math>1/r^2</math> in simple cases. For complex charge distributions the electric field can have quite a few different relationships, see the figure gallery below (for a more complete discussion please see [http://hyperphysics.phy-astr.gsu.edu/hbase/electric/elefie.html hyperphysics].

	However, there is one significant difference: gravitational fields are limited to attraction (pulling objects together) whereas electric fields can be either attractive or repulsive, depending on the charge of the object in the field. By definition, a positive charge in the force equation given above would experience a repulsive force (it would move away from the source of the field) and a negative charge would feel the attractive force.		However, there is one significant difference: gravitational fields are limited to attraction (pulling objects together) whereas electric fields can be either attractive or repulsive, depending on the charge of the object in the field. By definition, a positive charge in the force equation given above would experience a repulsive force (it would move away from the source of the field) and a negative charge would feel the attractive force.

J.williams: 1 revision imported

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J.williams at 16:53, 12 August 2015

2015-08-12T16:53:10Z

New page

[[Category:Done 2015-02-15]]
<onlyinclude>The '''electric field''' is one of the fundamental results of [[electromagnetic force|electromagnetism]], created by a static (stationary) charge, or by a dynamic (changing in time) [[magnetic field]]</onlyinclude>. An electric field is defined as the [[force]] per unit charge, given by the equation <m>E=F/q</m>, where q is the [[charge]] in [[coulomb]]s (C). Thus, when a charge is in the presence of an electric field it experiences a force causing the charged particle to move, which is given by rearranging the equation above so that <m>F=qE</m>.<ref>R. Chabay and B. Sherwood, "The Electric Field of a Dipole," in Matter & Interactions, 3rd ed., Hoboken, NJ: Wiley, 2011, ch.14, sec.6, pp. 556-560</ref>

The electric field can be looked at as analogous to a [[gravity|gravitational field]] in many ways, as massive objects are pulled towards each other in the presence of one another, just as charges are. The forces associated with each field also both fall off by an [[inverse square law]], <m>1/r^2</m> in simple cases. For complex charge distributions the electric field can have quite a few different relationships, see the figure gallery below (for a more complete discussion please see [http://hyperphysics.phy-astr.gsu.edu/hbase/electric/elefie.html hyperphysics).

However, there is one significant difference: gravitational fields are limited to attraction (pulling objects together) whereas electric fields can be either attractive or repulsive, depending on the charge of the object in the field. By definition, a positive charge in the force equation given above would experience a repulsive force (it would move away from the source of the field) and a negative charge would feel the attractive force.

Due to this attractive/repulsive nature of electric fields, there is a notation for drawing them. A positive stationary charge has its electric field lines pointing radially away from it (perpendicular lines away from its surface, in all directions), and a negative stationary charge has its lines pointing radially towards it.

<gallery mode=packed caption="Electric field lines" widths="400px" heights="200px" >
File:180px-VFPt_minus_thumb.svg.png|Figure 1. A negative charge with field lines pointing ''towards'' it.<ref> [GFDL (http://www.gnu.org/copyleft/fdl.html) or CC BY-SA 3.0 (http://creativecommons.org/licenses/by-sa/3.0)], via Wikimedia Commons</ref>
File:600px-VFPt_dipole_electric_manylines.svg.png|Figure 2. An interaction of positive and negative electric field lines, shown to be attractive.<ref>"VFPt dipole electric manylines" Licensed under CC BY-SA 3.0 via Wikimedia Commons - http://commons.wikimedia.org/wiki/File:VFPt_dipole_electric_manylines.svg#mediaviewer/File:VFPt_dipole_electric_manylines.svg</ref>
File:800px-VFPt_charges_plus_plus.svg.png|Figure 3. An interaction of two positive electric field lines, shown to be repulsive.<ref>"VFPt charges plus plus" Licensed under CC BY-SA 3.0 via Wikimedia Commons - http://commons.wikimedia.org/wiki/File:VFPt_charges_plus_plus.svg#mediaviewer/File:VFPt_charges_plus_plus.svg</ref>
</gallery>

==References==
{{reflist}}
[[Category:Uploaded]]