Final answer:
Direct current (DC) is a constant, even-flowing current that travels in one direction only, produced by chemical means. It is the flow of electric charge in only one direction and is the steady state of a constant-voltage circuit.
Step-by-step explanation:
Direct current (DC) is a constant, even-flowing current that travels in one direction only, produced by chemical means, often called DC current. It is the flow of electric charge in only one direction and is the steady state of a constant-voltage circuit.
For example, a battery provides a constant potential between its terminals, creating a DC current when connected to a device. Another way to produce DC current is by using a transformer to convert AC potential to DC potential.
Devices such as computers, cell phones, flashlights, and cars often use DC.
Direct current (DC) is a type of electrical current characterized by the flow of electric charge in only one direction, typically produced by sources such as batteries, which provide a constant voltage.
In contrast to alternating current (AC), which periodically reverses direction, DC maintains a constant, even flow, making it a steady state of a constant-voltage circuit. A common application of DC is in many portable electronic devices such as computers, cell phones, and flashlights, where a battery provides the necessary DC potential.