solenoid

A solenoid is a coil of wire wrapped tightly in a helical shape. When an electric current flows through it, it creates a magnetic field similar to a magnet, with a clear north and south pole. This magnetic field can be used to generate movement or to control other electrical devices. Solenoids are commonly found in various applications like electric door locks, valves, and mechanical switches, where they convert electrical energy into controlled mechanical motion or magnetic effects.