In circuit terminology, a complete circuit with no breaks is called what?

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

Answer: (D)

A path must be continuous to let current flow; when the loop is complete with no gaps, the circuit is closed, allowing energy to move from the source through the conductors and back to the source. That is what a closed circuit means. If there’s any break, current cannot travel and the circuit is open. A short circuit is a fault that creates a very low-resistance path, bypassing the intended load, so it’s still a loop but not the normal closed circuit. An deenergized circuit simply means the power source isn’t delivering energy, which doesn’t by itself define whether the loop is complete. So the term describing a complete circuit with no breaks is a closed circuit.