Direct current(DC) is a unidirectional movement of electron from a negative(-) to a more positive(+) side in a closed circuit or loop. It is made possible by a circuit consisting of a source(such as battery), a conducting path(wires), and normally, a load(bulb).
Conventionally, it is represented as if the current is moving from positive side of a source to a negative side. This is because a charge will move from an area of higher potential to a lower potential.
DC is the simplest form of electric source since it could be obtained by thermocouples, solar cells, and more abundantly in batteries. An AC supply can also be converted to DC by the use of a rectifier(diodes).
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