What does a closed circuit ensure?

A closed circuit ensures the flow of current because it completes the path for electrical current to travel. In a closed circuit, all components such as wires, resistors, and power sources are connected in such a way that electricity can flow freely from the power source through the components and back.

This flow of current is essential for any electrical device to operate. Without a closed circuit, there would be no continuity, and therefore, no current could flow. In contrast, an open circuit interrupts this flow, preventing the system from functioning. Understanding how a closed circuit operates is fundamental in electrical theory and practical applications in the field.