direct current

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direct current

direct current abbr. DC, a movement of electric charge across an arbitrarily defined surface in one direction only. See electricity ; generator .

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"direct current." The Columbia Encyclopedia, Sixth Edition. 2008. Encyclopedia.com. 16 Dec. 2009 <http://www.encyclopedia.com>.

"direct current." The Columbia Encyclopedia, Sixth Edition. 2008. Encyclopedia.com. (December 16, 2009). http://www.encyclopedia.com/doc/1E1-directcu.html

"direct current." The Columbia Encyclopedia, Sixth Edition. 2008. Retrieved December 16, 2009 from Encyclopedia.com: http://www.encyclopedia.com/doc/1E1-directcu.html

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direct current

A Dictionary of Earth Sciences | 1999 | | Â© A Dictionary of Earth Sciences 1999, originally published by Oxford University Press 1999. (Hide copyright information) Copyright

direct current A unidirectional current provided by a source of electrical energy. It is used in induced polarization surveys and in some electrical resistivity surveys, although very-low-frequency alternating current sources are being used increasingly to overcome problems of electrode and ground polarization.

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AILSA ALLABY and MICHAEL ALLABY. "direct current." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. 16 Dec. 2009 <http://www.encyclopedia.com>.

AILSA ALLABY and MICHAEL ALLABY. "direct current." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. (December 16, 2009). http://www.encyclopedia.com/doc/1O13-directcurrent.html

AILSA ALLABY and MICHAEL ALLABY. "direct current." A Dictionary of Earth Sciences. 1999. Retrieved December 16, 2009 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O13-directcurrent.html

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direct current

The Oxford Pocket Dictionary of Current English | 2009 | © The Oxford Pocket Dictionary of Current English 2009, originally published by Oxford University Press 2009. (Hide copyright information) Copyright

di·rect cur·rent (abbr.: DC) • n. an electric current flowing in one direction only. Compare with alternating current.

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"direct current." The Oxford Pocket Dictionary of Current English. 2009. Encyclopedia.com. 16 Dec. 2009 <http://www.encyclopedia.com>.

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"direct current." The Oxford Pocket Dictionary of Current English. 2009. Retrieved December 16, 2009 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O999-directcurrent.html

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