How does a solenoid function?

A solenoid functions by converting electrical energy into mechanical energy through the interaction of electric current and a magnetic field. When current flows through the coils of wire in the solenoid, a magnetic field is generated. This magnetic field then acts upon a movable core, typically made of metal, which can be pulled into the solenoid. This movement creates a linear motion that can be used to perform work, such as opening a valve or pushing a lever.

This transformation is fundamental to many applications, such as in electromechanical devices, where precise control of motion is required. The ability of solenoids to convert electrical energy to mechanical action makes them essential components in various systems, from automotive starters to industrial machinery. Other options do not describe the operation of a solenoid accurately, as they focus on regulation, measurement, or amplification, which are not functions of a solenoid.