An electrical device which consists of a frame, plunger, and coil to create a push or pull action is called what?

A solenoid is an electrical device that features a coil of wire, a plunger (or armature), and a frame. When an electric current passes through the coil, it generates a magnetic field, which either pulls or pushes the plunger, creating linear motion. This mechanism is commonly used in various applications, such as locking mechanisms, valves, and automotive starters, due to its ability to convert electrical energy into mechanical motion effectively.

The other options do not fit this specific description. A magnet is a material that generates a magnetic field naturally and does not rely on electrical input to create motion. A relay, while also an electromagnetic device, functions as a switch that opens or closes circuits rather than producing a direct push or pull action like a solenoid. A switch is a device used to make or break a connection in an electrical circuit but does not have the same operational mechanism involving a plunger and coil that characterizes a solenoid.