A Closed Circuit is defined as what?

• A. Complete circuit; no gaps. Electricity can flow.
• B. Incomplete circuit; there is a gap. Electricity cannot flow.
• C. Circuit with multiple paths; electricity can still flow if one path gets obstructed.
• D. Circuit with multiple paths; electricity will not flow if there is an obstruction.

Answer: (A)

Current can flow only when there is a complete loop for the charges to travel through. A closed circuit provides a continuous conducting path with no gaps, so electrons can leave the power source, move through wires and devices, and return to the source. That uninterrupted loop is what allows electricity to flow and power things. If there’s a gap, the loop is broken, so no current can complete the circuit—an open circuit. Having multiple paths doesn’t guarantee flow unless there is a complete path in at least one of them; the essential idea is the presence of a closed, unbroken loop.