What type of motor can be operated from a single-phase AC circuit?

The correct choice indicates that all the listed motor types can indeed operate from a single-phase AC circuit, which is an important concept in motor technology.

Focusing on this, a brushless DC motor can be powered by converting AC to DC, and it often requires an electronic controller which can be compatible with single-phase AC input through rectification. Meanwhile, capacitor motors, which are a type of single-phase induction motor, utilize capacitors to create a phase shift, allowing them to start and run effectively on a single-phase circuit. Synchronous motors, while typically associated with three-phase systems, can also operate from a single-phase AC supply when designed specifically for that, often incorporating additional starting components to manage the rotational speed and synchronization with the AC supply frequency.

This understanding is crucial for electricians and technicians, as it allows for versatility in applications where only single-phase power is available, ensuring motors can be chosen and installed correctly based on the electrical supply requirements.