Ohm's Law - Revision history

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	[[File:OhmsLawTriangle.jpg\|200px\|right]]		[[File:OhmsLawTriangle.jpg\|200px\|right]]
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			=====Description=====

	[http://en.wikipedia.org/wiki/Ohm%27s_law '''Ohm's law'''] is an extremely useful equation in the field of electrical/electronic engineering because it describes how voltage, current and resistance are interrelated.		[http://en.wikipedia.org/wiki/Ohm%27s_law '''Ohm's law'''] is an extremely useful equation in the field of electrical/electronic engineering because it describes how voltage, current and resistance are interrelated.


			=====Features and Applications=====

	If the three symbols for voltage '''''(V)''''', current '''''(I)''''' and resistance '''''(R)''''' are arranged in a triangle as shown, then the various representations of Ohm's Law can easily be seen - i.e.		If the three symbols for voltage '''''(V)''''', current '''''(I)''''' and resistance '''''(R)''''' are arranged in a triangle as shown, then the various representations of Ohm's Law can easily be seen - i.e.
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			{{Electronics Construction Tools Buyers Guide}}

	[[Category:Secondary]]		[[Category:Secondary]]
	[[Category:Electronics and Control]]		[[Category:Electronics and Control]]
	[[Category:Terminology]]		[[Category:Terminology]]

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	~~{{Terminology}}~~		[[Category:Secondary]]
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			{{Terminology}}

DT Online: Ohm's Law

2014-11-06T17:31:56Z

Ohm's Law

New page

[[File:OhmsLawTriangle.jpg|200px|right]]
[http://en.wikipedia.org/wiki/Ohm%27s_law '''Ohm's law'''] is an extremely useful equation in the field of electrical/electronic engineering because it describes how voltage, current and resistance are interrelated.

If the three symbols for voltage '''''(V)''''', current '''''(I)''''' and resistance '''''(R)''''' are arranged in a triangle as shown, then the various representations of Ohm's Law can easily be seen - i.e.

* Voltage = Current x Resistance '''''(V = I x R)'''''
* Current = Voltage / Resistance '''''(I = V / R)'''''
* Resistance = Voltage / Current '''''(R = V / I)'''''

A similar triangular graphic may be used to show the various relationships between '''[[Electrical Power|electrical power]]''' ''(watts)'', electrical current ''(amps)'' and voltage ''(volts)''.
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<span style="color: green">'''Note:'''
Abbreviations are usually named after the thing you're measuring, not the unit. So resistance is R, not O for ohms (Ω) but voltage is measured in volts, so it's V either way ''(the term '''‘electromotive force’''' and the symbol '''E''' are becoming less common, replaced by voltage and '''V''')''
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