What is the function of an electrical switch?

The function of an electrical switch is to control the flow of current in a circuit. When a switch is closed, it creates a complete path for electricity to flow, allowing current to pass through and energize connected devices. Conversely, when the switch is open, it breaks the circuit, stopping the flow of current and powering down the devices. This ability to open and close a circuit is fundamental in electrical systems, enabling users to turn devices on and off as needed.

Switches are integral to managing electrical systems and ensuring energy is used effectively. This control is critical in a variety of applications, from household appliances to industrial machinery, allowing for safe and efficient operation. Other functions like converting AC to DC or storing electrical energy pertain to different components, such as rectifiers and capacitors, respectively, while protection against overloads is typically managed by circuit breakers or fuses.