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Direct current (DC) is the unidirectional flow of an electric charge.

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  • Direct current
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  • Direct current (DC) is the unidirectional flow of an electric charge.
  • Direct current (DC or "continuous current") is the constant flow of electric charge from higher to lower potential.
  • The first commercial electric power transmission (developed by Thomas Edison in the late nineteenth century) used direct current. Because of the advantage of alternating current over direct current in transforming and transmission, electric power distribution today is nearly all alternating current. For applications requiring direct current, such as third rail power systems, alternating current is distributed to a substation, which utilizes a rectifier to convert the power to direct current. See War of Currents.
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dbkwik:engineering...iPageUsesTemplate
abstract
  • Direct current (DC) is the unidirectional flow of an electric charge.
  • Direct current (DC or "continuous current") is the constant flow of electric charge from higher to lower potential.
  • The first commercial electric power transmission (developed by Thomas Edison in the late nineteenth century) used direct current. Because of the advantage of alternating current over direct current in transforming and transmission, electric power distribution today is nearly all alternating current. For applications requiring direct current, such as third rail power systems, alternating current is distributed to a substation, which utilizes a rectifier to convert the power to direct current. See War of Currents. Direct current is used to charge batteries, and in nearly all electronic systems as the power supply. Very large quantities of direct-current power are used in production of aluminum and other electrochemical processes. Direct current is used for some railway propulsion, especially in urban areas. High voltage direct current is used to transmit large amounts of power from remote generation sites or to interconnect alternating current power grids.
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