A momentary switch is a type of electrical switch that only remains in the "on" position while it is being pressed or activated. Once the pressure is released, the switch returns to its default "off" state. This design is commonly used in applications where temporary activation is needed, such as in doorbells, computer keyboards, and remote controls. These switches can be found in various forms, including push-button, toggle, and slide types. Momentary switches are often used in circuit boards and control panels to provide a simple way to control devices without the need for a continuous connection.