A simple electric circuit is a closed path through which electric current can flow. Its main components are an electric cell (or battery), a bulb, a switch, and connecting wires. The electric cell acts as the source of electricity, providing the energy needed to push the charges through the circuit. The bulb is a device that glows when current passes through it, indicating the presence of an electric current and converting electrical energy into light and heat. The switch is crucial for controlling the flow of current; it can be used to either complete (close) the circuit, allowing current to flow, or break (open) the circuit, stopping the flow. Finally, the connecting wires provide a low-resistance path for the electric current to travel from one component to another, completing the circuit.