Resistor - Revision history

Jmdonev: 1 revision imported

2018-05-11T18:17:05Z

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Jmdonev at 19:17, 9 May 2018

2018-05-09T19:17:45Z

← Older revision		Revision as of 19:17, 9 May 2018
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	[[Category: Done ~~2015~~-09-06]]		[[Category:Done 2018-04-30]]
	[[File:Carbon_Resistor.gif\|framed\|right\|Figure 1. An example of a carbon resistor with the resistance colour code.<ref name=R1>HyperPhysics. (December 7, 2014). ''Resistors'' [Online]. Available: http://hyperphysics.phy-astr.gsu.edu/hbase/electronic/rescarb.html</ref>]]		[[File:Carbon_Resistor.gif\|framed\|right\|Figure 1. An example of a carbon resistor with the resistance colour code.<ref name=R1>HyperPhysics. (December 7, 2014). ''Resistors'' [Online]. Available: http://hyperphysics.phy-astr.gsu.edu/hbase/electronic/rescarb.html</ref>]]
	<onlyinclude>'''Resistors''' are [[electrical component]]s in an [[electric circuit]] that slow down current in the [[circuit]]. They deliberately lose [[energy]] in the form of [[heat]] or [[thermal energy]].</onlyinclude> ~~Resistors have a [[resistance]] from a few [[Ohm]]s (Ω) to several Megaohms (MΩ = million Ohms).~~		<onlyinclude>'''Resistors''' are [[electrical component]]s in an [[electric circuit]] that slow down current in the circuit. They deliberately lose [[energy]] in the form of [[heat]] or [[thermal energy]].</onlyinclude>

	Appliances such as electric [[heater]]s, [[appliance\|electric ovens]], and toasters all use resistors to turn current into heat, then using the heat lost from this resistor to warm the surrounding area. Even the [[filament]] from an [[incandescent light bulb]] is effectively a resistor, slowing down the current and heating up a [[wire]] to a high enough [[temperature]] that it gives off [[light]]. This light given off is known as [[blackbody radiation]].		Appliances such as electric [[heater]]s, [[appliance\|electric ovens]], and toasters all use resistors to turn current into heat, then using the heat lost from this resistor to warm the surrounding area. Even the [[filament]] from an [[incandescent light bulb]] is effectively a resistor, slowing down the current and heating up a [[wire]] to a high enough [[temperature]] that it gives off [[light]]. This light given off is known as [[blackbody radiation]].

	Resistors also have applications in electrical devices like [[computer]]s and [[cell phone]]s to damp out unwanted electrical signals. It's counter-intuitive, but even though [[energy]] is dissipated with resistance, resistors are absolutely essential to the proper functioning of electronics. They function to ensure that other components aren't provided with too much [[voltage]] or [[current]].		Resistors also have applications in electrical devices like [[computer]]s and [[cell phone]]s to damp out unwanted electrical signals. It's counter-intuitive, but even though [[energy]] is dissipated with resistance, resistors are absolutely essential to the proper functioning of electronics. They function to ensure that other components aren't provided with too much [[voltage]] or [[electric current]].

	Resistors ~~vary hugely over~~ a ~~wide range of~~ [[resistance]]s~~, more than a factor of 1,000,000~~. For more detailed information on resistors please see [http://hyperphysics.phy-astr.gsu.edu/hbase/electronic/rescarb.html#c1 hyperphysics]. An explanation of the colour code seen in figure 1 can be found [http://hyperphysics.phy-astr.gsu.edu/hbase/electronic/rescarb.html#c2 here].		Resistors have a [[resistance]] from a few [[Ohm]]s (Ω) to several Megaohms (MΩ = million Ohms). For more detailed information on resistors please see [http://hyperphysics.phy-astr.gsu.edu/hbase/electronic/rescarb.html#c1 hyperphysics]. An explanation of the colour code seen in figure 1 can be found [http://hyperphysics.phy-astr.gsu.edu/hbase/electronic/rescarb.html#c2 here].

	==Types of Resistors==		==Types of Resistors==
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	* '''Wire Wound''': This type of resistor has 2 leads with a coiled wire in between to provide resistance. The greater the length of wire the more resistance that is provided. Wire wound resistors are the most commonly used resistor in high [[power]] applications because they have a high surface area in comparison to carbon-composition resistors.<ref name="RE4"/> This increased surface area allows them to dissipate a larger amount of heat, which is required for such applications.		* '''Wire Wound''': This type of resistor has 2 leads with a coiled wire in between to provide resistance. The greater the length of wire the more resistance that is provided. Wire wound resistors are the most commonly used resistor in high [[power]] applications because they have a high surface area in comparison to carbon-composition resistors.<ref name="RE4"/> This increased surface area allows them to dissipate a larger amount of heat, which is required for such applications.
	* '''Integrated''': Integrated resistors are made with semi-conductors other than carbon. They are very small and therefore can have several packed into a single casing, however they are limited to low current applications.		* '''Integrated''': Integrated resistors are made with semi-conductors other than carbon. They are very small and therefore can have several packed into a single casing, however they are limited to low current applications.

			== For Further Reading ==
			For further information please see the related pages below:
			*[[Direct current]]
			*[[Electric current]]
			*[[Electrical grid]]
			*[[Superconductor]]
			* Or explore a [[Special:Random\| random page!]]

	==References==		==References==
	{{Reflist}}		{{Reflist}}
	[[Category:Uploaded]]		[[Category:Uploaded]]
	~~[[category: Mark edit]]~~

J.williams: 1 revision imported

2015-09-18T16:51:11Z

1 revision imported

← Older revision	Revision as of 16:51, 18 September 2015
(No difference)

Jmdonev at 20:08, 17 September 2015

2015-09-17T20:08:31Z

← Older revision		Revision as of 20:08, 17 September 2015
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	[[Category:Done 2015-09-05]]		[[Category: Done 2015-09-06]]
	[[File:Carbon_Resistor.gif\|framed\|right\|Figure 1. An example of a carbon resistor with the resistance colour code.<ref name=R1>HyperPhysics. (December 7, 2014). ''Resistors'' [Online]. Available: http://hyperphysics.phy-astr.gsu.edu/hbase/electronic/rescarb.html</ref>]]		[[File:Carbon_Resistor.gif\|framed\|right\|Figure 1. An example of a carbon resistor with the resistance colour code.<ref name=R1>HyperPhysics. (December 7, 2014). ''Resistors'' [Online]. Available: http://hyperphysics.phy-astr.gsu.edu/hbase/electronic/rescarb.html</ref>]]
	<onlyinclude>'''Resistors''' are [[electrical component]]s in an [[electric circuit]] that slow down current in the circuit. They deliberately lose [[energy]] in the form of [[heat]] or [[thermal energy]].</onlyinclude> Resistors have a [[resistance]] from a few [[Ohm]]s (Ω) to several Megaohms (MΩ = million Ohms).		<onlyinclude>'''Resistors''' are [[electrical component]]s in an [[electric circuit]] that slow down current in the [[circuit]]. They deliberately lose [[energy]] in the form of [[heat]] or [[thermal energy]].</onlyinclude> Resistors have a [[resistance]] from a few [[Ohm]]s (Ω) to several Megaohms (MΩ = million Ohms).

	Appliances such as electric [[heater]]s, [[appliance\|electric ovens]], and toasters all use resistors to turn current into heat, then using the heat lost from this resistor to warm the surrounding area. Even the [[filament]] from an [[incandescent light bulb]] is effectively a resistor, slowing down the current and heating up a wire to a high enough [[temperature]] that it gives off [[light]]. This light given off is known as [[blackbody radiation]].		Appliances such as electric [[heater]]s, [[appliance\|electric ovens]], and toasters all use resistors to turn current into heat, then using the heat lost from this resistor to warm the surrounding area. Even the [[filament]] from an [[incandescent light bulb]] is effectively a resistor, slowing down the current and heating up a [[wire]] to a high enough [[temperature]] that it gives off [[light]]. This light given off is known as [[blackbody radiation]].

	Resistors also have applications in electrical devices like [[computer]]s and [[cell phone]]s to damp out unwanted electrical signals. It's counter-intuitive, but even though [[energy]] is dissipated with resistance, resistors are absolutely essential to the proper functioning of electronics. They function to ensure that other components aren't provided with too much [[voltage]] or [[current]].		Resistors also have applications in electrical devices like [[computer]]s and [[cell phone]]s to damp out unwanted electrical signals. It's counter-intuitive, but even though [[energy]] is dissipated with resistance, resistors are absolutely essential to the proper functioning of electronics. They function to ensure that other components aren't provided with too much [[voltage]] or [[current]].
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	These resistors are the most common type of resistor and are built to resist at a specific ohmic value - meaning simply that they have one associated, pre-determined resistance value. There are several types of fixed resistors that exist, the main type being carbon-composition. Some specific types of fixed resistors include:		These resistors are the most common type of resistor and are built to resist at a specific ohmic value - meaning simply that they have one associated, pre-determined resistance value. There are several types of fixed resistors that exist, the main type being carbon-composition. Some specific types of fixed resistors include:
	[[File:Resistor.jpg\|400px\|framed\|right\|Figure 3. Carbon composition resistor with coloured bands to show the resistance.<ref>Wikimedia Commons. (May 20, 2015). ''Resistor'' [Online]. Available: http://commons.wikimedia.org/wiki/File:Resistor.JPG#/media/File:Resistor.JPG</ref>]]		[[File:Resistor.jpg\|400px\|framed\|right\|Figure 3. Carbon composition resistor with coloured bands to show the resistance.<ref>Wikimedia Commons. (May 20, 2015). ''Resistor'' [Online]. Available: http://commons.wikimedia.org/wiki/File:Resistor.JPG#/media/File:Resistor.JPG</ref>]]
	* '''Carbon-Composition''': This type of resistor, shown in Figure 3, has two metal leads separated by a column of [[carbon]] dust or [[graphite]] in the middle. As current flows past the first lead it reaches the carbon column, which resists a fraction of the moving [[charge]]. Current then passes through to the second lead at a lower current value than it started at initially.<ref name="RE4">Electronics Tutorial. (May 20, 2015). ''Types of Resistors'' [Online]. Available: http://www.electronics-tutorials.ws/resistor/res_1.html</ref> The resistivity of the carbon column can be modified by introducing [[impurities]], the effect on resistivty depends on the impurity added.		* '''Carbon-Composition''': This type of resistor, shown in Figure 3, has two [[metal]] leads separated by a column of [[carbon]] dust or [[graphite]] in the middle. As current flows past the first lead it reaches the carbon column, which resists a fraction of the moving [[charge]]. Current then passes through to the [[second]] lead at a lower current value than it started at initially.<ref name="RE4">Electronics Tutorial. (May 20, 2015). ''Types of Resistors'' [Online]. Available: http://www.electronics-tutorials.ws/resistor/res_1.html</ref> The [[resistivity]] of the carbon column can be modified by introducing [[impurities]], the effect on resistivty depends on the impurity added.
	* '''Wire Wound''': This type of resistor has 2 leads with a coiled wire in between to provide resistance. The greater the length of wire the more resistance that is provided. Wire wound resistors are the most commonly used resistor in high power applications because they have a high surface area in comparison to carbon-composition resistors.<ref name="RE4"/> This increased surface area allows them to dissipate a larger amount of heat, which is required for such applications.		* '''Wire Wound''': This type of resistor has 2 leads with a coiled wire in between to provide resistance. The greater the length of wire the more resistance that is provided. Wire wound resistors are the most commonly used resistor in high [[power]] applications because they have a high surface area in comparison to carbon-composition resistors.<ref name="RE4"/> This increased surface area allows them to dissipate a larger amount of heat, which is required for such applications.
	* '''Integrated''': Integrated resistors are made with semi-conductors other than carbon. They are very small and therefore can have several packed into a single casing, however they are limited to low current applications.		* '''Integrated''': Integrated resistors are made with semi-conductors other than carbon. They are very small and therefore can have several packed into a single casing, however they are limited to low current applications.

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	{{Reflist}}		{{Reflist}}
	[[Category:Uploaded]]		[[Category:Uploaded]]
			[[category: Mark edit]]

J.williams: 1 revision imported

2015-09-03T18:22:45Z

1 revision imported

← Older revision	Revision as of 18:22, 3 September 2015
(No difference)

Jmdonev at 23:33, 28 August 2015

2015-08-28T23:33:16Z

← Older revision		Revision as of 23:33, 28 August 2015
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	[[Category:Done 2015-06-11]]		[[Category:Done 2015-09-05]]
	[[File:Carbon_Resistor.gif\|framed\|right\|Figure 1. An example of a carbon resistor with the resistance colour code.<ref name=R1>HyperPhysics. (December 7, 2014). ''Resistors'' [Online]. Available: http://hyperphysics.phy-astr.gsu.edu/hbase/electronic/rescarb.html</ref>]]		[[File:Carbon_Resistor.gif\|framed\|right\|Figure 1. An example of a carbon resistor with the resistance colour code.<ref name=R1>HyperPhysics. (December 7, 2014). ''Resistors'' [Online]. Available: http://hyperphysics.phy-astr.gsu.edu/hbase/electronic/rescarb.html</ref>]]
	<onlyinclude>'''Resistors''' are [[electrical component]]s in an [[electric circuit]] that slow down current in the circuit. They deliberately lose [[energy]] in the form of [[heat]] or [[thermal energy]].</onlyinclude> Resistors have a [[resistance]] from a few [[Ohm]]s (Ω) to several Megaohms (MΩ = million Ohms).		<onlyinclude>'''Resistors''' are [[electrical component]]s in an [[electric circuit]] that slow down current in the circuit. They deliberately lose [[energy]] in the form of [[heat]] or [[thermal energy]].</onlyinclude> Resistors have a [[resistance]] from a few [[Ohm]]s (Ω) to several Megaohms (MΩ = million Ohms).

	Appliances such as electric [[heater]]s, ~~electric~~ [[~~oven~~]]s, and ~~[[toaster]]s~~ all use resistors to turn current into heat, then using the heat lost from this resistor to warm the surrounding area. Even the [[filament]] from an [[incandescent light bulb]] is effectively a resistor, slowing down the current and heating up a wire to a high enough [[temperature]] that it gives off [[light]]. This light given off is known as [[blackbody radiation]].		Appliances such as electric [[heater]]s, [[appliance\|electric ovens]], and toasters all use resistors to turn current into heat, then using the heat lost from this resistor to warm the surrounding area. Even the [[filament]] from an [[incandescent light bulb]] is effectively a resistor, slowing down the current and heating up a wire to a high enough [[temperature]] that it gives off [[light]]. This light given off is known as [[blackbody radiation]].

	Resistors also have applications in electrical devices like [[computer]]s and [[cell phone]]s to damp out unwanted electrical signals. It's counter-intuitive, but even though [[energy]] is dissipated with resistance, resistors are absolutely essential to the proper functioning of electronics. They function to ensure that other components aren't provided with too much [[voltage]] or [[current]].		Resistors also have applications in electrical devices like [[computer]]s and [[cell phone]]s to damp out unwanted electrical signals. It's counter-intuitive, but even though [[energy]] is dissipated with resistance, resistors are absolutely essential to the proper functioning of electronics. They function to ensure that other components aren't provided with too much [[voltage]] or [[current]].

J.williams: 1 revision imported

2015-08-26T21:31:36Z

1 revision imported

← Older revision	Revision as of 21:31, 26 August 2015
(No difference)

J.williams at 16:58, 12 August 2015

2015-08-12T16:58:54Z

New page

[[Category:Done 2015-06-11]]
[[File:Carbon_Resistor.gif|framed|right|Figure 1. An example of a carbon resistor with the resistance colour code.<ref name=R1>HyperPhysics. (December 7, 2014). ''Resistors'' [Online]. Available: http://hyperphysics.phy-astr.gsu.edu/hbase/electronic/rescarb.html</ref>]]
<onlyinclude>'''Resistors''' are [[electrical component]]s in an [[electric circuit]] that slow down current in the circuit. They deliberately lose [[energy]] in the form of [[heat]] or [[thermal energy]].</onlyinclude> Resistors have a [[resistance]] from a few [[Ohm]]s (Ω) to several Megaohms (MΩ = million Ohms).

Appliances such as electric [[heater]]s, electric [[oven]]s, and [[toaster]]s all use resistors to turn current into heat, then using the heat lost from this resistor to warm the surrounding area. Even the [[filament]] from an [[incandescent light bulb]] is effectively a resistor, slowing down the current and heating up a wire to a high enough [[temperature]] that it gives off [[light]]. This light given off is known as [[blackbody radiation]].

Resistors also have applications in electrical devices like [[computer]]s and [[cell phone]]s to damp out unwanted electrical signals. It's counter-intuitive, but even though [[energy]] is dissipated with resistance, resistors are absolutely essential to the proper functioning of electronics. They function to ensure that other components aren't provided with too much [[voltage]] or [[current]].

Resistors vary hugely over a wide range of [[resistance]]s, more than a factor of 1,000,000. For more detailed information on resistors please see [http://hyperphysics.phy-astr.gsu.edu/hbase/electronic/rescarb.html#c1 hyperphysics]. An explanation of the colour code seen in figure 1 can be found [http://hyperphysics.phy-astr.gsu.edu/hbase/electronic/rescarb.html#c2 here].

==Types of Resistors==
[[File:456px-PCB_variable_resistors.jpg|400px|framed|right|Figure 2. Variable resistors.<ref>Wikimedia Commons. (May 20, 2015). ''PCB Variable Resistors'' [Online]. Available: http://commons.wikimedia.org/wiki/File:PCB_variable_resistors.jpg#/media/File:PCB_variable_resistors.jpg</ref>]]
There are numerous different ways to build a resistor, and each method has benefits and drawbacks in terms of versatility and cost. The two major types of resistors that can be seen are ''variable'' and ''fixed'' resistors.
===Variable===
Variable resistors, shown in Figure 2, are simply a special type of resistor that can be adjusted to any ohmic value - or level of resistance - within a certain range.
===Fixed===
These resistors are the most common type of resistor and are built to resist at a specific ohmic value - meaning simply that they have one associated, pre-determined resistance value. There are several types of fixed resistors that exist, the main type being carbon-composition. Some specific types of fixed resistors include:
[[File:Resistor.jpg|400px|framed|right|Figure 3. Carbon composition resistor with coloured bands to show the resistance.<ref>Wikimedia Commons. (May 20, 2015). ''Resistor'' [Online]. Available: http://commons.wikimedia.org/wiki/File:Resistor.JPG#/media/File:Resistor.JPG</ref>]]
* '''Carbon-Composition''': This type of resistor, shown in Figure 3, has two metal leads separated by a column of [[carbon]] dust or [[graphite]] in the middle. As current flows past the first lead it reaches the carbon column, which resists a fraction of the moving [[charge]]. Current then passes through to the second lead at a lower current value than it started at initially.<ref name="RE4">Electronics Tutorial. (May 20, 2015). ''Types of Resistors'' [Online]. Available: http://www.electronics-tutorials.ws/resistor/res_1.html</ref> The resistivity of the carbon column can be modified by introducing [[impurities]], the effect on resistivty depends on the impurity added.
* '''Wire Wound''': This type of resistor has 2 leads with a coiled wire in between to provide resistance. The greater the length of wire the more resistance that is provided. Wire wound resistors are the most commonly used resistor in high power applications because they have a high surface area in comparison to carbon-composition resistors.<ref name="RE4"/> This increased surface area allows them to dissipate a larger amount of heat, which is required for such applications.
* '''Integrated''': Integrated resistors are made with semi-conductors other than carbon. They are very small and therefore can have several packed into a single casing, however they are limited to low current applications.

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