Magnet - Revision history

Jmdonev: 1 revision imported

2018-05-18T22:53:16Z

1 revision imported

← Older revision	Revision as of 22:53, 18 May 2018
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Jmdonev at 20:50, 18 May 2018

2018-05-18T20:50:43Z

← Older revision		Revision as of 20:50, 18 May 2018
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	[[category:371 topics]]		[[category:371 topics]]
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	[[File:Bar magnet.jpg\|250px\|right\|thumb\|Figure 1: A bar magnet, with labelled north and south poles.<ref>Wikimedia Commons [Online], Available: http://upload.wikimedia.org/wikipedia/commons/d/d8/Bar_magnet.jpg</ref>]]		[[File:Bar magnet.jpg\|250px\|right\|thumb\|Figure 1: A bar magnet, with labelled north and south poles.<ref>Wikimedia Commons [Online], Available: http://upload.wikimedia.org/wikipedia/commons/d/d8/Bar_magnet.jpg</ref>]]
	[[File:Compmag.gif\|framed\|Figure 1: The magnetic field of a bar magnet, with the direction of the field pointing from North to South as shown by the compass needle.<ref name=hyp>Hyperphysics, ''Magnets and Electromagnets'' [Online], Available: http://hyperphysics.phy-astr.gsu.edu/hbase/magnetic/elemag.html</ref>]]		[[File:Compmag.gif\|framed\|Figure 1: The magnetic field of a bar magnet, with the direction of the field pointing from North to South as shown by the compass needle.<ref name=hyp>Hyperphysics, ''Magnets and Electromagnets'' [Online], Available: http://hyperphysics.phy-astr.gsu.edu/hbase/magnetic/elemag.html</ref>]]
	<onlyinclude>A '''magnet''' is a type of material that produces a [[magnetic field]]. The magnetic field produced is invisible, but its effects are felt very easily when put in contact with other magnetic materials.</onlyinclude>		<onlyinclude>A '''magnet''' is a type of material that produces a [[magnetic field]]. The magnetic field produced is invisible, but its effects are felt very easily when put in contact with other magnetic materials.</onlyinclude>

			Magnets are important for [[electric generator]]s because spinning a magnet near a coil of [[wire]] produces [[electricity]]. For example, a [[wind turbine]] is using [[wind]] to spin the magnet, a [[hydroelectric facility]] does the same, but with the power of moving [[water]].

	A magnet is characterized by its two poles; North and South. These poles create a magnetic field that flows from the North to the South pole, and can be depicted by a compass needle as shown in Figure 2. A compass needle is actually a [[#Types of Magnets\|permanent magnet]], and naturally orients itself to align with any magnetic field.<ref name=hyp/>		A magnet is characterized by its two poles; North and South. These poles create a magnetic field that flows from the North to the South pole, and can be depicted by a compass needle as shown in Figure 2. A compass needle is actually a [[#Types of Magnets\|permanent magnet]], and naturally orients itself to align with any magnetic field.<ref name=hyp/>

			Changing magnetic fields move create [[electric current]] near loops of [[wire]]

	The ability for a material to respond to a magnetic field is discussed in more depth on [http://hyperphysics.phy-astr.gsu.edu/hbase/magnetic/elemag.html hyperphysics].		The ability for a material to respond to a magnetic field is discussed in more depth on [http://hyperphysics.phy-astr.gsu.edu/hbase/magnetic/elemag.html hyperphysics].
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	* '''Electromagnets''' are very strong magnets, used in devices such as computers, televisions and motors. They are made by placing a metal core inside a coil of wire that is carrying an electrical current. The electricity going through the wire produces a magnetic field. While the electric current is flowing, the core acts as a strong magnet.<ref name=tool/> Electromagnets are used in many [[generator]]s and [[power plant]]s.		* '''Electromagnets''' are very strong magnets, used in devices such as computers, televisions and motors. They are made by placing a metal core inside a coil of wire that is carrying an electrical current. The electricity going through the wire produces a magnetic field. While the electric current is flowing, the core acts as a strong magnet.<ref name=tool/> Electromagnets are used in many [[generator]]s and [[power plant]]s.

			==Phet Simulation==
			The [http://phet.colorado.edu/ University of Colorado] has graciously allowed us to use the following Phet simulation. This simulation illustrates how changing a magnetic field creates current. Move the magnet and watch what happens with the current.

			<html>
			<iframe src="https://phet.colorado.edu/sims/html/faradays-law/latest/faradays-law_en.html" width="800" height="600" scrolling="no" allowfullscreen></iframe></html>

			== For Further Reading ==
			For further information please see the related pages below:
			*[[Alternating current]]
			*[[Transformer]]
			*[[Electrical grid]]
			*[[Electric generator]]
			*[[Magnetic force]]
			*[[Magnetic flux]]
			*Or explore a [[Special:Random\|random page]]
	==References==		==References==
	{{reflist}}		{{reflist}}
	[[Category:Uploaded]]		[[Category:Uploaded]]

J.williams: 1 revision imported

2015-08-26T21:31:19Z

1 revision imported

← Older revision	Revision as of 21:31, 26 August 2015
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J.williams at 16:56, 12 August 2015

2015-08-12T16:56:47Z

New page

[[category:371 topics]]
[[Category:Done 2015-04-01]]
[[File:Bar magnet.jpg|250px|right|thumb|Figure 1: A bar magnet, with labelled north and south poles.<ref>Wikimedia Commons [Online], Available: http://upload.wikimedia.org/wikipedia/commons/d/d8/Bar_magnet.jpg</ref>]]
[[File:Compmag.gif|framed|Figure 1: The magnetic field of a bar magnet, with the direction of the field pointing from North to South as shown by the compass needle.<ref name=hyp>Hyperphysics, ''Magnets and Electromagnets'' [Online], Available: http://hyperphysics.phy-astr.gsu.edu/hbase/magnetic/elemag.html</ref>]]
<onlyinclude>A '''magnet''' is a type of material that produces a [[magnetic field]]. The magnetic field produced is invisible, but its effects are felt very easily when put in contact with other magnetic materials.</onlyinclude>

A magnet is characterized by its two poles; North and South. These poles create a magnetic field that flows from the North to the South pole, and can be depicted by a compass needle as shown in Figure 2. A compass needle is actually a [[#Types of Magnets|permanent magnet]], and naturally orients itself to align with any magnetic field.<ref name=hyp/>

The ability for a material to respond to a magnetic field is discussed in more depth on [http://hyperphysics.phy-astr.gsu.edu/hbase/magnetic/elemag.html hyperphysics].

==Types of Magnets==
There are 3 types of magnets:<ref name=tool>Home Science Tools, ''Types of Magnets'' [Online], Available: http://www.hometrainingtools.com/a/magnet-types-science-teaching-tip</ref>

* '''Permanent magnets''', typically called ferromagnetic, are materials that do not easily lose their magnetism once they are magnetized. Materials can be magnetized by coming into contact with an external magnetic field. This process can be accelerated by first heating and then cooling the material. Such materials are also referred to as ''hard'' magnets.<ref name=serway>R. Serway and C. Vuille, "Magnets" in ''Essentials of College Physics'' [Online], Available: http://books.google.ca/books?id=8n4NCyRgUMEC&pg=PA493&redir_esc=y#v=onepage&q&f=false</ref> Permanent magnets are often used in [[wind turbine]]s.

* '''Temporary magnets''' are very easily magnetized (by an external field), but tend to lose their magnetism gradually over time. These magnets are also referred to as ''soft'' magnets.<ref name=serway/>

* '''Electromagnets''' are very strong magnets, used in devices such as computers, televisions and motors. They are made by placing a metal core inside a coil of wire that is carrying an electrical current. The electricity going through the wire produces a magnetic field. While the electric current is flowing, the core acts as a strong magnet.<ref name=tool/> Electromagnets are used in many [[generator]]s and [[power plant]]s.

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