Direct current

Direct current (DC) is one-directional flow of electric charge. An electrochemical cell is a prime example of DC power. Direct current may flow through a conductor such as a wire, but can also flow through semiconductors, insulators, or even through a vacuum as in electron or ion beams.

The electric current flows in a constant direction, distinguishing it from alternating current (AC).
A term formerly used for this type of current was galvanic current.

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Source: Wikipedia · Image: Wikimedia Commons · Public domain

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