An actuator is a device that:

A) changes AC to DC.
B) changes DC to AC.
C) converts an electrical signal into mechanical movement.
D) converts mechanical movement into an electrical signal.

Actuator

An output device normally connected to an output module. Examples are an air valve and cylinder.

Electrical Signal

A form of signal that uses electrical currents or voltages to relay information across circuits or systems.

Mechanical Movement

The motion or action of mechanical parts or systems, often driven by motors or manual force.