What is meant by continuity in an electrical circuit?

• A. The circuit is open; electrons cannot flow.
• B. The circuit must have a fuse.
• C. The voltage must be constant.
• D. The circuit is continuous or complete when electrons can flow from one terminal of the power source to another.

Answer: (D)

Continuity means there is a closed, unbroken path for current to flow. In a circuit, electrons need a complete loop from the power source’s one terminal, through conductors and any loads, back to the other terminal. If any break occurs—like an open switch, a broken wire, or a blown fuse—the loop is interrupted and current cannot flow. The presence of a fuse or a constant voltage isn’t what continuity is about; a fuse protects the circuit and can interrupt continuity if needed, and voltage can vary while the loop remains complete. So, the idea is simply that electrons can travel from one terminal of the power source to the other through a continuous path.