Electromagnetic induction - Revision history

Jmdonev: 1 revision imported

2020-04-28T15:32:24Z

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energy>Jmdonev at 18:16, 18 February 2020

2020-02-18T18:16:59Z

← Older revision		Revision as of 18:16, 18 February 2020
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	[[Category:Done ~~2018~~-05-18]]		[[Category:Done 2020-02-29]]
	[[File:Faraday_disk_generator.jpg\|200px\|thumb\|Figure 1. One of Michael Faraday's first devices for demonstrating induction.<ref>Wikimedia Commons [Online], Available: http://upload.wikimedia.org/wikipedia/commons/1/19/Faraday_disk_generator.jpg</ref>]]		[[File:Faraday_disk_generator.jpg\|200px\|thumb\|Figure 1. One of Michael Faraday's first devices for demonstrating induction.<ref>Wikimedia Commons [Online], Available: http://upload.wikimedia.org/wikipedia/commons/1/19/Faraday_disk_generator.jpg</ref>]]

	<onlyinclude>'''Electromagnetic induction''' is the production of an [[electromotive force]] (EMF) being created as a result of relative motion between a [[magnetic field]] and a [[conductor]].</onlyinclude> It was discovered in 1831 by Michael Faraday,<ref>UIUC Physics, ''A Brief History of The Development of Classical Electrodynamics'' [Online PDF], Available: http://web.hep.uiuc.edu/home/serrede/P435/Lecture_Notes/A_Brief_History_of_Electromagnetism.pdf</ref> and lays the foundation for [[electrical generation]] in [[power plant]]s, [[electric motor]]s, and [[AC ]]circuitry which powers the [[electrical grid]], [[transformer]]s, and many more phenomena.		<onlyinclude>'''Electromagnetic induction''' is the production of an [[electromotive force]] (EMF) being created as a result of relative motion between a [[magnetic field]] and a [[conductor]].</onlyinclude> It was discovered in 1831 by Michael Faraday,<ref>UIUC Physics, ''A Brief History of The Development of Classical Electrodynamics'' [Online PDF], Available: http://web.hep.uiuc.edu/home/serrede/P435/Lecture_Notes/A_Brief_History_of_Electromagnetism.pdf</ref> and lays the foundation for [[electrical generation]] in [[power plant]]s, [[electric motor]]s, and [[AC ]]circuitry which powers the [[electrical grid]], [[transformer]]s, and many more phenomena.

	The ~~concept of~~ electromagnetic induction is ~~commonly referred to as~~ Faraday's Law, which states that any change in the magnetic environment of a coiled [[wire]] will cause a [[voltage]] (EMF) to be induced.<Ref name=hyp>Hyperphysics, ''Faraday's Law'' [Online], Available: http://hyperphysics.phy-astr.gsu.edu/hbase/electric/farlaw.html</ref> Faraday found many ways for this to happen such as changing the magnetic field strength, moving a [[magnet]] through a coil of wire, and moving the coil through a magnetic field, just to name a few. The voltage (EMF) generated in a coil of wire can be described by the following equation:<ref name=hyp/>		The equation that mathematically describes electromagnetic induction is '''Faraday's Law''', which states that any change in the magnetic environment of a coiled [[wire]] will cause a [[voltage]] (EMF) to be induced.<Ref name=hyp>Hyperphysics, ''Faraday's Law'' [Online], Available: http://hyperphysics.phy-astr.gsu.edu/hbase/electric/farlaw.html</ref> Faraday found many ways for this to happen such as changing the magnetic field strength, moving a [[magnet]] through a coil of wire, and moving the coil through a magnetic field, just to name a few. The voltage (EMF) generated in a coil of wire can be described by the following equation:<ref name=hyp/>

	<center><math>EMF=-N\frac{\Delta(BA)}{\Delta t}</math></center>		<center><math>EMF=-N\frac{\Delta(BA)}{\Delta t}</math></center>
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	PhET has graciously allowed us to use their simulations, and the one below demonstrates Faraday's law of electromagnetic induction. The voltage is seen to change as the magnetic flux changes through it.		PhET has graciously allowed us to use their simulations, and the one below demonstrates Faraday's law of electromagnetic induction. The voltage is seen to change as the magnetic flux changes through it.

	<html><iframe src="~~http~~://phet.colorado.edu/sims/html/faradays-law/latest/faradays-law_en.html" width="800" height="600"></iframe></html>		<html><iframe src="https://phet.colorado.edu/sims/html/faradays-law/latest/faradays-law_en.html" width="800" height="600"></iframe></html>

	== For Further Reading ==		== For Further Reading ==

Jmdonev: 1 revision imported

2018-05-18T22:53:07Z

1 revision imported

← Older revision	Revision as of 22:53, 18 May 2018
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Jmdonev at 19:34, 11 May 2018

2018-05-11T19:34:18Z

← Older revision		Revision as of 19:34, 11 May 2018
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	[[Category:Done ~~2015~~-06-11]]		[[Category:Done 2018-05-18]]
	[[File:Faraday_disk_generator.jpg\|200px\|thumb\|Figure 1. One of Michael Faraday's first devices for demonstrating induction.<ref>Wikimedia Commons [Online], Available: http://upload.wikimedia.org/wikipedia/commons/1/19/Faraday_disk_generator.jpg</ref>]]		[[File:Faraday_disk_generator.jpg\|200px\|thumb\|Figure 1. One of Michael Faraday's first devices for demonstrating induction.<ref>Wikimedia Commons [Online], Available: http://upload.wikimedia.org/wikipedia/commons/1/19/Faraday_disk_generator.jpg</ref>]]

	<onlyinclude>'''Electromagnetic induction''' is the production of an [[electromotive force]] (EMF) being created as a result of relative motion between a [[magnetic field]] and a [[conductor]].</onlyinclude> It was discovered in 1831 by Michael Faraday,<ref>UIUC Physics, ''A Brief History of The Development of Classical Electrodynamics'' [Online PDF], Available: http://web.hep.uiuc.edu/home/serrede/P435/Lecture_Notes/A_Brief_History_of_Electromagnetism.pdf</ref> and lays the foundation for [[electrical generation]] in [[power plant]]s, [[electric motor]]s, [[AC ]]circuitry which powers the [[electrical grid]], [[transformer]]s, and many more phenomena.		<onlyinclude>'''Electromagnetic induction''' is the production of an [[electromotive force]] (EMF) being created as a result of relative motion between a [[magnetic field]] and a [[conductor]].</onlyinclude> It was discovered in 1831 by Michael Faraday,<ref>UIUC Physics, ''A Brief History of The Development of Classical Electrodynamics'' [Online PDF], Available: http://web.hep.uiuc.edu/home/serrede/P435/Lecture_Notes/A_Brief_History_of_Electromagnetism.pdf</ref> and lays the foundation for [[electrical generation]] in [[power plant]]s, [[electric motor]]s, and [[AC ]]circuitry which powers the [[electrical grid]], [[transformer]]s, and many more phenomena.

	The concept of electromagnetic induction is commonly referred to as Faraday's Law, which states that any change in the magnetic environment of a ~~coil of~~ [[wire]] will cause a [[voltage]] (EMF) to be induced.<Ref name=hyp>Hyperphysics, ''Faraday's Law'' [Online], Available: http://hyperphysics.phy-astr.gsu.edu/hbase/electric/farlaw.html</ref> Faraday found many ways for this to happen, such as changing the magnetic field strength, moving a [[magnet]] through a coil of wire, moving the coil through a magnetic field, ~~and~~ a few ~~others~~. The voltage (EMF) generated in a coil of wire can be described by the following equation:<ref name=hyp/>		The concept of electromagnetic induction is commonly referred to as Faraday's Law, which states that any change in the magnetic environment of a coiled [[wire]] will cause a [[voltage]] (EMF) to be induced.<Ref name=hyp>Hyperphysics, ''Faraday's Law'' [Online], Available: http://hyperphysics.phy-astr.gsu.edu/hbase/electric/farlaw.html</ref> Faraday found many ways for this to happen such as changing the magnetic field strength, moving a [[magnet]] through a coil of wire, and moving the coil through a magnetic field, just to name a few. The voltage (EMF) generated in a coil of wire can be described by the following equation:<ref name=hyp/>

	<center><m>EMF=-N\frac{\Delta(BA)}{\Delta t}</m></center>		<center><math>EMF=-N\frac{\Delta(BA)}{\Delta t}</math></center>

	where		where

	*<m>N</m> is the number of turns in the wire		*<math>N</math> is the number of turns in the wire
	*<m>\Delta(BA)</m> is the change in [[magnetic flux]]		*<math>\Delta(BA)</math> is the change in [[magnetic flux]]
	*<m>\Delta t</m> is the change in time		*<math>\Delta t</math> is the change in time

	The ways that Faraday found to change this flux as stated above can all be represented in this equation. The reason this equation is negative is because of [[Lenz's law]], which requires any change in magnetic flux to be reproduced in equal strength but opposite direction by the wire.		The ways that Faraday found to change this flux as stated above can all be represented in this equation. The reason this equation is negative is because of [[Lenz's law]], which requires any change in magnetic flux to be reproduced in equal strength but opposite direction by the wire.

	Faraday's law is important for ~~almost all~~ electromagnetic applications in the world, including cars. The [[ignition]] system in a car's [[internal combustion engine]] takes only 12 [[volt]]s from the [[battery]] and ramps that up to 40000 volts! Visit [http://hyperphysics.phy-astr.gsu.edu/hbase/magnetic/ignition.html#c1 Hyperphysics] to learn how.		Faraday's law is important for many electromagnetic applications in the world, including cars. The [[ignition]] system in a car's [[internal combustion engine]] takes only 12 [[volt]]s from the [[battery]] and ramps that up to 40000 volts! Visit [http://hyperphysics.phy-astr.gsu.edu/hbase/magnetic/ignition.html#c1 Hyperphysics] to learn how.

	===PhET Simulation of Induction===		===PhET Simulation of Induction===
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	<html><iframe src="http://phet.colorado.edu/sims/html/faradays-law/latest/faradays-law_en.html" width="800" height="600"></iframe></html>		<html><iframe src="http://phet.colorado.edu/sims/html/faradays-law/latest/faradays-law_en.html" width="800" height="600"></iframe></html>

			== For Further Reading ==
			For further information please see the related pages below:
			*[[Electric current]]
			*[[Electricity]]
			*[[Electromotive force]]
			*[[Battery]]
			*[[Fuel cell]]
			*[[Special:Random\|A random page]]
	==References==		==References==
	{{Reflist}}		{{Reflist}}
	[[Category:Uploaded]]		[[Category:Uploaded]]

J.williams: 1 revision imported

2015-08-26T21:31:03Z

1 revision imported

← Older revision	Revision as of 21:31, 26 August 2015
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J.williams at 16:53, 12 August 2015

2015-08-12T16:53:14Z

New page

[[Category:Done 2015-06-11]]
[[File:Faraday_disk_generator.jpg|200px|thumb|Figure 1. One of Michael Faraday's first devices for demonstrating induction.<ref>Wikimedia Commons [Online], Available: http://upload.wikimedia.org/wikipedia/commons/1/19/Faraday_disk_generator.jpg</ref>]]

<onlyinclude>'''Electromagnetic induction''' is the production of an [[electromotive force]] (EMF) being created as a result of relative motion between a [[magnetic field]] and a [[conductor]].</onlyinclude> It was discovered in 1831 by Michael Faraday,<ref>UIUC Physics, ''A Brief History of The Development of Classical Electrodynamics'' [Online PDF], Available: http://web.hep.uiuc.edu/home/serrede/P435/Lecture_Notes/A_Brief_History_of_Electromagnetism.pdf</ref> and lays the foundation for [[electrical generation]] in [[power plant]]s, [[electric motor]]s, [[AC ]]circuitry which powers the [[electrical grid]], [[transformer]]s, and many more phenomena.

The concept of electromagnetic induction is commonly referred to as Faraday's Law, which states that any change in the magnetic environment of a coil of [[wire]] will cause a [[voltage]] (EMF) to be induced.<Ref name=hyp>Hyperphysics, ''Faraday's Law'' [Online], Available: http://hyperphysics.phy-astr.gsu.edu/hbase/electric/farlaw.html</ref> Faraday found many ways for this to happen, such as changing the magnetic field strength, moving a [[magnet]] through a coil of wire, moving the coil through a magnetic field, and a few others. The voltage (EMF) generated in a coil of wire can be described by the following equation:<ref name=hyp/>

<center><m>EMF=-N\frac{\Delta(BA)}{\Delta t}</m></center>

where

*<m>N</m> is the number of turns in the wire
*<m>\Delta(BA)</m> is the change in [[magnetic flux]]
*<m>\Delta t</m> is the change in time

The ways that Faraday found to change this flux as stated above can all be represented in this equation. The reason this equation is negative is because of [[Lenz's law]], which requires any change in magnetic flux to be reproduced in equal strength but opposite direction by the wire.

Faraday's law is important for almost all electromagnetic applications in the world, including cars. The [[ignition]] system in a car's [[internal combustion engine]] takes only 12 [[volt]]s from the [[battery]] and ramps that up to 40000 volts! Visit [http://hyperphysics.phy-astr.gsu.edu/hbase/magnetic/ignition.html#c1 Hyperphysics] to learn how.

===PhET Simulation of Induction===
PhET has graciously allowed us to use their simulations, and the one below demonstrates Faraday's law of electromagnetic induction. The voltage is seen to change as the magnetic flux changes through it.

<html><iframe src="http://phet.colorado.edu/sims/html/faradays-law/latest/faradays-law_en.html" width="800" height="600"></iframe></html>

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