What is a common characteristic of an induction motor?

An induction motor is characterized by its operation on alternating current (AC) power. This is fundamental to its design and function, as the rotating magnetic field produced by AC power is what induces current in the rotor, allowing it to rotate. Induction motors are widely used in various industrial and commercial applications because of their simplicity, durability, and efficiency when powered by AC.

While other characteristics, such as high starting torque and constant speed under varying loads, can apply to specific types of induction motors or operational conditions, they do not universally define all induction motors. Additionally, induction motors do not require brushes for operation; this is a feature of other motor types, like DC motors or brushed motors. Hence, the defining characteristic of an induction motor is that it exclusively operates on AC power.