Direct current (DC) is the unidirectional flow of electric charge. Direct current is produced by sources such as batteries, thermocouples, solar cells, and commutator-type electric machines of the dynamo type. Direct current may flow in 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 direct current was galvanic current.
DC subject Notes:
https://www.dropbox.com/s/4jp069l2gxsrgm0/DC%20lecture%20by%20hafiz%20constant
and
https://www.dropbox.com/s/rh0mc5pro5tdsxo/DC%20by%20hafiz%20constant
The electric current flows in a constant direction, distinguishing it from alternating current (AC). A term formerly used for direct current was galvanic current.
DC subject Notes:
https://www.dropbox.com/s/4jp069l2gxsrgm0/DC%20lecture%20by%20hafiz%20constant
and
https://www.dropbox.com/s/rh0mc5pro5tdsxo/DC%20by%20hafiz%20constant
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