A circuit that has only one current path is called what?

A circuit that has only one current path is referred to as a series circuit. In a series circuit, all components are connected end-to-end, so the current flows through each component in a singular path. This means that if any part of the circuit is interrupted, the entire circuit stops functioning because the current cannot complete its loop. This characteristic of having a single pathway is fundamental in series circuits, leading to specific behavior in terms of voltage distribution and current flow.

In contrast, other types of circuits, such as parallel circuits, allow multiple paths for current, where each branch operates independently. Open circuits indicate that there is a break somewhere in the circuit, preventing current from flowing at all. Closed circuits, while functioning properly, can involve either series or parallel configurations, but do not specifically refer to having only one current path. Therefore, the defining feature of a series circuit is its singular current path, which is what makes this answer correct.