What is the function of a switch in an electrical circuit?

The function of a switch in an electrical circuit is to control the flow of electricity. A switch acts as a gateway for electrical current, allowing it to be turned on or off as needed. When a switch is closed, it completes the circuit, permitting electricity to flow freely. Conversely, when opened, it breaks the circuit, halting the flow of electricity. This simple mechanism enables users to manage power delivery to various devices or sections of a circuit safely and easily. Understanding this role is fundamental in both designing and troubleshooting electrical systems, as switches are integral to controlling operational functions in everything from basic light fixtures to complex machinery.