Nate Electrical Practice Exam 2025 – 400 Free Practice Questions to Pass the Exam

A synchronous motor is characterized by its ability to operate at a constant speed that is directly synchronized with the frequency of the supply voltage. This means that the motor's rotational speed is locked to the frequency of the alternating current (AC) supply, which provides a predictable and stable performance over varying load conditions.

In contrast to other types of motors, such as induction motors that can slip and experience variations in speed under different loads, synchronous motors maintain their rated speed regardless of load changes. This feature makes them particularly useful in applications where precise speed control is essential, such as in synchronous generators or in industrial applications requiring consistent timing and operation.

The other options highlight attributes of different types of motors. For example, motors that change speed based on load or operate at variable speeds are typically asynchronous or induction motors rather than synchronous motors, which strictly adhere to speed synchronization with supply frequency. Lastly, the option referring to running solely on DC power is not relevant, as synchronous motors are primarily powered by AC.