Impedance - Revision history

TimVK4YEH at 10:09, 30 April 2009

2009-04-30T10:09:11Z

← Older revision		Revision as of 03:09, 30 April 2009
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	Related wiki pages: [[Electronic Theory]], [[Capacitors]], [[Inductors]]		Related wiki pages: [[Electronic Theory]], [[Capacitors]], [[Inductors]], [[Ohm's Law]]

	Impedance is a property of electrical circuits that "impedes" current from flowing. Fundamentally, there are two types of impedance: '''[[Resistance]]''' and '''[[Reactance]]'''.		Impedance is a property of electrical circuits that "impedes" current from flowing. Fundamentally, there are two types of impedance: '''[[Resistance]]''' and '''[[Reactance]]'''.

Carlb at 01:17, 9 April 2009

2009-04-09T01:17:15Z

← Older revision		Revision as of 18:17, 8 April 2009
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	where V is voltage and I is current. For working with [[alternating current]], this is more correct than the usual [[direct current]] equation <math>V = IR\,</math>.		where V is voltage and I is current. For working with [[alternating current]], this is more correct than the usual [[direct current]] equation <math>V = IR\,</math>.


			{{electronics}}
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TimVK4YEH: Protected "Impedance" [edit=autoconfirmed:move=autoconfirmed]

2008-08-21T19:50:53Z

Protected "Impedance" [edit=autoconfirmed:move=autoconfirmed]

← Older revision	Revision as of 12:50, 21 August 2008
(No difference)

TimVK4YEH: internal links

2008-07-04T00:07:59Z

internal links

← Older revision		Revision as of 17:07, 3 July 2008
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			Related wiki pages: [[Electronic Theory]], [[Capacitors]], [[Inductors]]

	Impedance is a property of electrical circuits that "impedes" current from flowing. Fundamentally, there are two types of impedance: '''[[Resistance]]''' and '''[[Reactance]]'''.		Impedance is a property of electrical circuits that "impedes" current from flowing. Fundamentally, there are two types of impedance: '''[[Resistance]]''' and '''[[Reactance]]'''.

YL: First draft of impedance page.

2008-04-26T01:34:03Z

First draft of impedance page.

New page

Impedance is a property of electrical circuits that "impedes" current from flowing. Fundamentally, there are two types of impedance: '''[[Resistance]]''' and '''[[Reactance]]'''.

The magnitude of impedance (represented by <math>Z\,</math>) of a circuit or component can be computed by taking the sum of the squares of the resistance (represented by <math>R\,</math>) and reactance (represented by <math>X\,</math>).

<math>Z = \sqrt{R^2 + X^2}\,</math>

However, it is more useful to represent impedance as a [[complex number]] and use it in [[phasor analysis]].

Impedance can be used in the normal [[Ohm's Law]] equation:

<math>V = IZ\,</math>

where V is voltage and I is current. For working with [[alternating current]], this is more correct than the usual [[direct current]] equation <math>V = IR\,</math>.