What is one characteristic of a good motor?

A high power factor is a key characteristic of a good motor because it indicates how effectively the motor converts electrical energy into mechanical energy. A high power factor means that most of the power supplied to the motor is being used for useful work, rather than being wasted as reactive power. This is essential for improving the overall efficiency of the motor, leading to reduced operating costs and better performance.

In contrast, low weight is not necessarily a defining feature of a motor's effectiveness. While a lighter motor may be easier to handle or install, it does not directly impact efficiency or performance. Minimal torque would actually be undesirable in many applications, as torque is critical for the motor's ability to perform work. Energy inefficiency is counterproductive, as it implies that the motor consumes more electrical power than necessary for its operation, leading to higher costs and potential performance issues. Therefore, high power factor stands out as the most desirable trait for a motor, ensuring effective energy use and optimal performance.