What does a closed switch do in an electrical circuit?

In an electrical circuit, a closed switch completes the circuit path, allowing electric current to flow freely. When the switch is closed, it effectively connects different components of the circuit, which can include power sources like batteries and loads such as light bulbs or motors. Turning the circuit "on" means that power is being supplied to these components, enabling them to function as intended.

When a switch is open, it breaks the circuit, preventing current flow and essentially turning the circuit "off." Therefore, the role of a closed switch is crucial for activating the circuit and allowing it to operate.