What mechanism does a solenoid utilize to operate?

A solenoid operates primarily through the use of an electromagnet and a movable iron core. When electrical current flows through the coil of wire surrounding the core, a magnetic field is created, which in turn attracts or repels the movable iron core. This movement translates into mechanical motion, allowing the solenoid to perform tasks such as opening or closing valves, actuating levers, or triggering switches.

The design of the solenoid takes advantage of the properties of electromagnetism; as soon as the current is turned off, the magnetic field dissipates and the core returns to its original position, often aided by a spring or other returning mechanism. This efficient operation is what makes solenoids useful in various applications, including in aircraft systems where precise control of components is required.