What type of current flows constantly in one direction only?

Direct current (DC) is characterized by the flow of electric charge that moves consistently in one direction. This steady flow of electrons makes it a fundamental type of current in various applications, such as in batteries, electronics, and some power supplies. In contrast to alternating current (AC), which periodically reverses direction, DC maintains a constant voltage and current flow, making it ideal for powering electronic devices that require a stable voltage level.

Understanding the nature of direct current is essential for anyone working with electrical systems or appliances, as many rely on this type of current for their operation. While pulsating current and static current have their own characteristics, neither represents a consistent flow in one direction like direct current does.