Potential difference: Difference between revisions

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Revision as of 21:07, 22 October 2008 edit75.161.52.188 (talk)No edit summary← Previous edit		Latest revision as of 18:28, 21 February 2018 edit undoJc3s5h (talk \| contribs)Extended confirmed users, Pending changes reviewers, Rollbackers32,895 edits "Potential difference" is a synonym of "voltage", albeit the former theoretically could use any units and the latter would use volts.
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	In ], the '''potential difference''' or '''p.d.''' between two points is the difference of the points' ], equivalent to the line integral of the ] between the two points.

	There are various types of potential difference related to the amount of ] required to move an object from one place to another against various types of ]s.

	* in ], the potential difference corresponds to the amount of ] that would need to be done on a unit ] to move it from one point to the other against an ].<ref></ref> P.d. is synonymous with ] <ref></ref> and is measured in ]s. It is the line integral of the ] between two points.<ref>Pitt, V.H. (ed.), ''The Penguin Dictionary of Physics'', Penguin Books Ltd., 1977, ISBN 0140510710</ref> Also, if ''v'' is the p.d. in volts, ''w'' is the work in ]s (J), and ''q'' is the charge in ]s (C), then:
	*:<math> v = -{ w \over q } {\mathrm{J} \over \mathrm{C}} \ \mathrm{or} \ -{w \over q} \mathrm{V} </math>
	*:{{main\|Voltage}}
	* In ], the ''] difference'' between two points on Earth is related to the energy that would be required to move a unit ] from one point to the other against the Earth's ]. Units: joules per kilogram.
	* In fluid systems the ''potential difference'' is the difference in ]. Units: ]s.
	* In thermal systems the ''potential difference'' is the difference in ]. Units: ]s.

	In some engineering fields, "potential" is sometimes described as the ']', whereas ] is the ']'. The product of the flux and the potential difference is the ], which is the time rate of change of ].

	==References==
	{{Reflist}}

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Latest revision as of 18:28, 21 February 2018

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