What is a switch? Copy

A switch is an electromechanical device used to control power in electrical and electronic circuits by turning it on and off or it is also termed as make and break an electrical circuit. A switch will have one or more contacts based on the type of switch. When current can flow from one contact to another, the switch is ON and is said to be closed. When there is a separation preventing the current flow between the contacts, the switch is OFF and is said to be open.