Electricity will flow in a circuit only if the circuit is what?

Electricity requires a closed circuit to flow, as a closed circuit provides a complete path for the electric current to travel. When the circuit is closed, all components are connected, allowing electrons to move freely from the power source through the components and back, completing the circuit.

In contrast, an open circuit disrupts this path, preventing electricity from flowing. A damaged circuit may have breaks or faults that can also create an open condition, resulting in interrupted flow. Insulation protects the conductive parts of the circuit, but it does not affect the circuit's ability to be closed or open. Therefore, a closed circuit is essential for the flow of electricity.