Which of the following switches is likely used for a doorbell?

• A. Dual on/off switch
• B. Relay switch
• C. Push switch
• D. Two-way switch

Answer: (C)

The push switch is the correct choice for a doorbell because it is designed to complete a circuit when pressed and then return to its original state when released. This momentary action is ideal for a doorbell since the switch only needs to be activated briefly to ring the bell.

In the context of a doorbell system, the push switch allows users to signal their presence by pressing it, which triggers the bell or chime without the need for a sustained action. Other types of switches, like a dual on/off switch or a two-way switch, are designed for different applications—typically controlling a light fixture from two different locations or turning a device on and off, and therefore would not function effectively for the quick, momentary action required by a doorbell. The relay switch, while potentially useful in controlling larger loads or for more complex circuit configurations, is not specifically needed for the simple operation of a doorbell, making the push switch the most suitable option in this case.