direct current


May 13, 2015

Direct current (or DC) is the unidirectional flow of electric charge. Direct current is produced by sources such as batteries and solar cells. In DC, the electric current flows in a constant direction, distinguishing it from alternating current (AC) which reverses direction periodically. The first commercial electric power transmission, developed by Thomas Edison, used direct current but was discarded in preference for AC power sources for our businesses and homes.