Which term best describes a completed circuit or path?

• A. Open circuit
• B. Disconnected circuit
• C. Closed circuit
• D. Short circuit

Answer: (C)

A closed circuit is defined as a complete and unbroken path through which electric current can flow. In a closed circuit, all components of the circuit, such as wires, resistors, and power sources, are connected in such a way that electricity is able to move continuously from the power source, through the load (like a light bulb or motor), and back to the power source. This allows the electrical devices in the circuit to operate normally.

An open circuit, by contrast, refers to a broken or incomplete path that prevents current from flowing. This could be due to a switch being turned off or a wire being disconnected. A disconnected circuit also denotes a lack of continued connection, much like an open circuit, resulting in no current flow. A short circuit, meanwhile, occurs when the current takes an unintended path, which can lead to excessive current that bypasses the load, potentially causing damage or hazards.

Therefore, the term that best describes a completed circuit or path, allowing for current flow and device functionality, is a closed circuit.