What type of electric current flows in one direction only?

Direct current (DC) is the type of electric current that flows in one direction only. In DC, the electrons move steadily from the negative terminal to the positive terminal of a power source, maintaining a consistent polarity. This unidirectional flow is utilized in many applications, such as batteries, solar power systems, and electronic devices. Unlike alternating current (AC), which changes direction periodically, direct current provides a stable and constant voltage, making it ideal for powering electronic circuits and charging batteries.

The other options represent different concepts or errors in terminology. For example, alternating current involves the flow of electric charge that periodically reverses direction, which is contrary to the characteristic of direct current. Static current is not a standard term used in electrical terminology, as it implies a lack of movement. Indirect current is not recognized in electrical theory and doesn’t accurately describe any type of current flow. Understanding these differences is essential for grasping the fundamentals of electrical circuits and their applications.