Electromagnet - Revision history

Ellen References at 14:23, 5 December 2019

2019-12-05T14:23:14Z

Ellen References at 11:16, 19 November 2019

2019-11-19T11:16:42Z

Ellen References at 10:56, 4 November 2019

2019-11-04T10:56:49Z

NRJC: /* Key Stage 4 */

2019-03-05T08:42:12Z

‎Key Stage 4

NRJC at 20:01, 4 March 2019

2019-03-04T20:01:39Z

NRJC at 13:35, 4 March 2019

2019-03-04T13:35:42Z

NRJC: /* Compared to a Bar Magnet */

2018-11-01T10:05:35Z

‎Compared to a Bar Magnet

NRJC: /* Compared to a Bar Magnet */

2018-11-01T10:05:10Z

‎Compared to a Bar Magnet

NRJC at 10:04, 1 November 2018

2018-11-01T10:04:43Z

NRJC: Created page with "==Key Stage 3== ===Meaning=== An electromagnet is a magnet made from a coil of wire wrapped around a soft iron core. ===About Electromagnets=== : Elec..."

2018-11-01T09:58:17Z

Created page with "==Key Stage 3== ===Meaning=== An electromagnet is a magnet made from a coil of wire wrapped around a soft iron core. ===About Electromagnets=== : Elec..."

New page

==Key Stage 3==
===Meaning===
An [[electromagnet]] is a [[magnet]] made from a coil of wire wrapped around a [[Soft Iron|soft iron]] core.

===About Electromagnets===
: [[Electromagnet]]s only work when there is a [[Direct Current|direct current]] passing through the coil of wire.
: An [[electromagnet]] can be turned off and on.
: The strength of an [[electromagnet]] depends on; the number of coils of [[wire]], the [[Electrical Current|current]] through the [[wire]] and how easily the [[Soft Iron|soft iron]] core can be [[Magnetise|magnetised]].
{| class="wikitable"
|-
|[[File:MagneticFieldLinesElectromagnet.png|center|400px]]
|-
| style="height:20px; width:200px; text-align:center;" |The direction of the [[Magnetic Field|magnetic field]] can be changed by changing the direction of the [[Electrical Current|current]].
|}

← Older revision		Revision as of 14:23, 5 December 2019
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	:[https://www.amazon.co.uk/gp/product/1782948163/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782948163&linkCode=as2&tag=nrjc-21&linkId=0fdbfd5dd397d6e24a9dfb250f08587f ''Electromagnets, pages 270-272, GCSE Physics, CGP, Edexcel '']		:[https://www.amazon.co.uk/gp/product/1782948163/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782948163&linkCode=as2&tag=nrjc-21&linkId=0fdbfd5dd397d6e24a9dfb250f08587f ''Electromagnets, pages 270-272, GCSE Physics, CGP, Edexcel '']
	:[https://www.amazon.co.uk/gp/product/1782948163/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782948163&linkCode=as2&tag=nrjc-21&linkId=0fdbfd5dd397d6e24a9dfb250f08587f ''Electromagnets; uses, pages 271-279, GCSE Physics, CGP, Edexcel '']		:[https://www.amazon.co.uk/gp/product/1782948163/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782948163&linkCode=as2&tag=nrjc-21&linkId=0fdbfd5dd397d6e24a9dfb250f08587f ''Electromagnets; uses, pages 271-279, GCSE Physics, CGP, Edexcel '']
		+
		+	====OCR====
		+	:[https://www.amazon.co.uk/gp/product/0198359837/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=0198359837&linkCode=as2&tag=nrjc-21&linkId=3c4229e8b023b2b60768e7ea2307cc6f ''Electromagnets, pages 123, Gateway GCSE Physics, Oxford, OCR '']

← Older revision		Revision as of 11:16, 19 November 2019
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	:[https://www.amazon.co.uk/gp/product/1471851362/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1471851362&linkCode=as2&tag=nrjc-21&linkId=7d78d70a2044ee9982dae010c94af92a ''Electromagnets, pages 279, GCSE Combined Science Trilogy 2, Hodder, AQA '']		:[https://www.amazon.co.uk/gp/product/1471851362/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1471851362&linkCode=as2&tag=nrjc-21&linkId=7d78d70a2044ee9982dae010c94af92a ''Electromagnets, pages 279, GCSE Combined Science Trilogy 2, Hodder, AQA '']
	:[https://www.amazon.co.uk/gp/product/1782945970/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945970&linkCode=as2&tag=nrjc-21&linkId=a120d24dcc7cc7a58192069a3aafc1d2 ''Electromagnets, pages 292, 293, GCSE Physics; The Complete 9-1 Course for AQA, CGP, AQA '']		:[https://www.amazon.co.uk/gp/product/1782945970/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945970&linkCode=as2&tag=nrjc-21&linkId=a120d24dcc7cc7a58192069a3aafc1d2 ''Electromagnets, pages 292, 293, GCSE Physics; The Complete 9-1 Course for AQA, CGP, AQA '']
		+
		+	====Edexcel====
		+
		+	:[https://www.amazon.co.uk/gp/product/1292120223/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1292120223&linkCode=as2&tag=nrjc-21&linkId=068ecf40278c32406a7f1c6e66751417 ''Electromagnets, page 171, GCSE Physics, Pearson Edexcel '']
		+	:[https://www.amazon.co.uk/gp/product/1782945741/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945741&linkCode=as2&tag=nrjc-21&linkId=30da4f2178da182547b62a7329d13b57 ''Electromagnets, page 198, GCSE Combined Science; The Revision Guide, CGP, Edexcel '']
		+	:[https://www.amazon.co.uk/gp/product/1292120193/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1292120193&linkCode=as2&tag=nrjc-21&linkId=572df39392fb4200db8391d98ae6314e ''Electromagnets, page 405, GCSE Combined Science, Pearson Edexcel '']
		+	:[https://www.amazon.co.uk/gp/product/1782945733/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945733&linkCode=as2&tag=nrjc-21&linkId=2a2dbec9db6bf5766c0458d908fa0a52 ''Electromagnets, page 88, GCSE Physics; The Revision Guide, CGP, Edexcel '']
		+	:[https://www.amazon.co.uk/gp/product/1782948163/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782948163&linkCode=as2&tag=nrjc-21&linkId=0fdbfd5dd397d6e24a9dfb250f08587f ''Electromagnets, pages 270-272, GCSE Physics, CGP, Edexcel '']
		+	:[https://www.amazon.co.uk/gp/product/1782948163/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782948163&linkCode=as2&tag=nrjc-21&linkId=0fdbfd5dd397d6e24a9dfb250f08587f ''Electromagnets; uses, pages 271-279, GCSE Physics, CGP, Edexcel '']

← Older revision		Revision as of 10:56, 4 November 2019
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	\| style="height:20px; width:200px; text-align:center;" colspan = "2"\|When the [[switch]] is closed the [[electromagnet]] pulls the [[Iron]] armature towards it. This causes the a [[metal]] arm to bend and the striker to hit the bell. When the arm bends the [[circuit]] is broken and the [[electromagnet]] turns off. This allows the striker to move back away from the bell, where electrical contact is made and the process repeats.		\| style="height:20px; width:200px; text-align:center;" colspan = "2"\|When the [[switch]] is closed the [[electromagnet]] pulls the [[Iron]] armature towards it. This causes the a [[metal]] arm to bend and the striker to hit the bell. When the arm bends the [[circuit]] is broken and the [[electromagnet]] turns off. This allows the striker to move back away from the bell, where electrical contact is made and the process repeats.
	\|}		\|}
		+
		+	===References===
		+	====AQA====
		+
		+	:[https://www.amazon.co.uk/gp/product/1782946403/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782946403&linkCode=as2&tag=nrjc-21&linkId=32a0abb60dff015b15b50e9b1d7b4644 ''Electromagnets, page 219, GCSE Combined Science Trilogy; Physics, CGP, AQA '']
		+	:[https://www.amazon.co.uk/gp/product/019835939X/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=019835939X&linkCode=as2&tag=nrjc-21&linkId=57e96876985fc39b1a3d8a3e3dc238b6 ''Electromagnets, pages 217-219, GCSE Physics; Third Edition, Oxford University Press, AQA '']
		+	:[https://www.amazon.co.uk/gp/product/1471851370/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1471851370&linkCode=as2&tag=nrjc-21&linkId=01c69b0ae058f809cf636033e6ba793e ''Electromagnets, pages 225-6. GCSE Physics, Hodder, AQA '']
		+	:[https://www.amazon.co.uk/gp/product/1471851362/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1471851362&linkCode=as2&tag=nrjc-21&linkId=7d78d70a2044ee9982dae010c94af92a ''Electromagnets, pages 279, GCSE Combined Science Trilogy 2, Hodder, AQA '']
		+	:[https://www.amazon.co.uk/gp/product/1782945970/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945970&linkCode=as2&tag=nrjc-21&linkId=a120d24dcc7cc7a58192069a3aafc1d2 ''Electromagnets, pages 292, 293, GCSE Physics; The Complete 9-1 Course for AQA, CGP, AQA '']

← Older revision		Revision as of 08:42, 5 March 2019
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	[[Electromagnet]]s increase in [[temperature]] as they are used.		[[Electromagnet]]s increase in [[temperature]] as they are used.
		+	\|}
		+
		+	===Applications===
		+	{\| class="wikitable"
		+	\|-
		+	\|[[File:RelayDiagram1.png\|center\|300px]]
		+	\|[[File:RelayDiagram2.png\|center\|300px]]
		+	\|-
		+	\| style="height:20px; width:200px; text-align:center;" colspan = "2"\|When the switch is closed the [[electromagnet]] pulls the [[Iron]] armature towards it. This causes the the two large electrical contacts to touch. When the [[switch]] is open the [[electromagnet]] turns off and the contacts separate.
		+
		+	This is used for safety reasons so that a [[switch]] can be used to operate a [[circuit]] with a very large [[Electrical Current\|current]] indirectly.
		+	\|}
		+
		+	{\| class="wikitable"
		+	\|-
		+	\|[[File:BellDiagram1.png\|center\|300px]]
		+	\|[[File:BellDiagram2.png\|center\|300px]]
		+	\|-
		+	\| style="height:20px; width:200px; text-align:center;" colspan = "2"\|When the [[switch]] is closed the [[electromagnet]] pulls the [[Iron]] armature towards it. This causes the a [[metal]] arm to bend and the striker to hit the bell. When the arm bends the [[circuit]] is broken and the [[electromagnet]] turns off. This allows the striker to move back away from the bell, where electrical contact is made and the process repeats.
	\|}		\|}

@@ Line 9: / Line 9: @@
 *The more coils of wire the stronger the [[electromagnet]].
 *The greater the [[Electrical Current|current]] through the [[wire]] the stronger the [[electromagnet]].
 *The more easily [[Magnetise|magnetised]] the [[Soft Iron|soft iron]] core, the stronger the [[electromagnet]].

@@ Line 20: / Line 20: @@
 ===Compared to a Bar Magnet===
 {| class="wikitable"
-| style="height:20px; width:200px; text-align:center;" |'''Advantages of an Electromagnet over a Bar Magnet'''
+| style="height:20px; width:300px; text-align:center;" |'''Advantages of an Electromagnet over a Bar Magnet'''
-| style="height:20px; width:200px; text-align:center;" |'''Disadvantages of an Electromagnet compared to a Bar Magnet'''
+| style="height:20px; width:300px; text-align:center;" |'''Disadvantages of an Electromagnet compared to a Bar Magnet'''
 |-
-| style="height:20px; width:200px; text-align:left;" |
+| style="height:20px; width:300px; text-align:left;" |
 Changing the [[Electrical Current|current]] can change the strength of an [[electromagnet]].
@@ Line 29: / Line 29: @@
 The direction of the [[Magnetic Field|magnetic field]] can be changed in an [[electromagnet]] by changing the direction of the [[Electrical Current|current]].
-| style="height:20px; width:200px; text-align:left;" |
+| style="height:20px; width:300px; text-align:left;" |
 [[Electromagnet]]s require a source of power to work.
 [[Electromagnet]]s increase in [[temperature]] as they are used.
 |}

@@ Line 7: / Line 7: @@
 : An [[electromagnet]] can be turned off and on.
 : The strength of an [[electromagnet]] depends on; the number of coils of [[wire]], the [[Electrical Current|current]] through the [[wire]] and how easily the [[Soft Iron|soft iron]] core can be [[Magnetise|magnetised]].
 {| class="wikitable"
 |-
@@ Line 12: / Line 16: @@
 |-
 | style="height:20px; width:200px; text-align:center;" |The direction of the [[Magnetic Field|magnetic field]] can be changed by changing the direction of the [[Electrical Current|current]].
 |}