Which term is defined as the complete path that an electric current travels along?

• A. Bus bar
• B. Coaxial cable
• C. Capacitor
• D. Circuit

Answer: (D)

The main idea here is understanding what provides the complete path for electrical current to flow. A circuit is that complete loop—an uninterrupted path that starts at a power source, travels through conductors to a load or device, and returns to the source. This closed loop allows continuous current flow; if the loop is broken, the current stops because there’s no return path.

In practice, a bus bar is a large conductor used to distribute power to many circuits, but it’s only part of the network, not the full current path. A coaxial cable is used for signal transmission rather than serving as the primary current loop for power delivery. A capacitor stores energy and affects current temporarily during charging or discharging, but it does not define the complete, ongoing path for current in a circuit.