Momentary switches are electrical components that only allow current to flow when they are pressed or activated. They are commonly used in devices like doorbells, computer keyboards, and remote controls. When the switch is released, the circuit is broken, stopping the flow of electricity. These switches come in various forms, including push-button, toggle, and rocker styles. Momentary switches are essential for applications where temporary activation is needed, allowing users to control devices without maintaining pressure on the switch. Their design ensures that they return to their original state once released.