What is a switch?

A switch is defined as a device that allows you to control a circuit manually. This means that it enables the user to open or close an electrical circuit at will, thereby controlling the flow of electricity. The fundamental operation of a switch involves connecting or disconnecting the path through which current flows, typically using a lever, button, or toggle that the user can physically manipulate.

In the context of electrical circuits, switches are essential components because they provide a straightforward and effective way to manage electrical power, turning devices on or off as needed. This manual control is crucial in various applications, ranging from simple household light switches to more complex systems in industrial settings.

While it might be tempting to think of a switch as having automatic features, such automation typically refers to other devices such as relays or circuit breakers that activate under certain conditions without direct human interaction. Therefore, focusing on the manual operation of switches distinguishes them from these other components.