What term describes current that flows in one direction, such as in batteries and USB power connections?

Direct current is the term that accurately describes the type of electrical current that flows in one direction, which is characteristic of batteries and USB power connections. In direct current (DC), the flow of electrons moves consistently in a single direction, making it suitable for applications that require a stable and predictable power supply.

This is in contrast to alternating current (AC), where the flow of electrons periodically reverses direction, typically used in household power systems. Static current does not refer to a flow of current at all but rather indicates a lack of movement, as it pertains to the accumulation of electric charge without a continuous flow. The term current loop is used more specifically in the context of analog signals in industrial systems, typically referring to a closed circuit that carries a current for measuring instrumentation.

Understanding the characteristics and applications of direct current is crucial for working with electronic devices and circuits, especially those that depend on stable power sources like batteries and USB-powered devices.