What type of current only flows in one direction?

Direct Current (DC) is characterized by the flow of electric charge only in one direction. This means that the voltage across the circuit remains constant over time, which leads to a steady flow of electrons. DC is widely used in many applications, particularly in battery-powered devices, electronic circuits, and applications such as solar energy systems.

In contrast, Alternating Current (AC) fluctuates in direction, periodically reversing itself, which is how it gets its name. Static Current typically refers to charges at rest rather than charges in motion and is not a recognized type of current flow in electrical circuits. Complex Current involves both AC and DC components but does not refer to a current that flows in only one direction. Therefore, the defining characteristic of DC aligns perfectly with the question’s criteria, making it the correct answer.