What type of current flows steadily in one direction?

Direct current (DC) refers to the only type of electrical current that flows steadily in one direction. This characteristic makes it suitable for applications where a constant and unidirectional flow of electricity is needed, such as in batteries, electronic circuits, and charging systems. In a DC system, the voltage remains constant over time, which is essential for powering many electronic devices and ensuring their functionality.

In contrast, alternating current (AC) periodically changes its direction, making it ideal for power distribution across long distances. Digital and analog currents refer more to the type of signals used in communication and processing rather than the flow of electrical current itself. Digital signals represent data in binary form, while analog signals vary continuously. Thus, the clear distinction of DC as a steady, one-directional current differentiates it from these other types.