What is the primary purpose of a motor?

• A. A device that provides rotary mechanical motion.
• B. A device that stores electrical energy.
• C. A valve that controls fluid flow.
• D. A sensor that measures speed.

Answer: (A)

A motor’s main job is to convert electrical energy into motion. It produces rotary mechanical motion on its shaft, which is what drives components like pumps, fans, gears, or other connected machinery. This distinguishes it from a battery or capacitor (which stores energy), a valve (which controls fluid flow), or a sensor (which measures something). In an emergency vehicle, motors enable rotation that powers pumps and cooling fans, turning electrical power into useful mechanical work.