What is the main function of an electromagnetic solenoid and what is it used for in devices?

An electromagnetic solenoid is a coil with wire through which an electric current passes, creating a magnetic field. The main function of a solenoid is to convert electrical energy into mechanical motion (linear or rotational).

In devices, solenoids are used to control various mechanisms: opening and closing valves, switching levers, activating locks, starting relays, and other actuators. For example, in automatic doors, a solenoid may be responsible for locking, and in printers, for moving the print head.