Which device converts electrical energy into motion to drive a mechanical system?

• A. Electric motor
• B. Sensor
• C. Pushbutton
• D. PLC

Answer: (A)

Electric motors convert electrical energy into motion to drive mechanical systems. They turn electrical power into rotational (or linear) movement that powers gears, belts, conveyors, robotic joints, and similar components.

A sensor, on the other hand, measures a physical property (like position or temperature) and provides data to control systems; it does not generate motion from electrical energy. A pushbutton is simply a switch that starts or stops circuits but does not create motion by itself. A PLC is a programmable controller that sequences and controls those motions but does not directly convert electrical energy into motion.