What role does a capacitor serve in an appliance motor?

A capacitor serves a crucial function in an appliance motor by aiding in both the starting and efficient operation of the motor. In single-phase induction motors, capacitors are used to create a phase shift, which helps to generate a rotating magnetic field. This is essential for initiating the motor's movement. Without this phase shift, the motor would struggle to start or might not start at all.

Once the motor is running, the capacitor also assists in improving operational efficiency. It helps to maintain a higher power factor, which is important because it allows the motor to operate more effectively and reduces energy losses. By providing the necessary electrical characteristics, the capacitor ensures that the motor runs smoothly and can handle the load it's designed for.

This dual role—assisting with starting the motor and enhancing its performance during operation—highlights the capacitor’s importance in the functionality of appliance motors, making the choice of its role clear and well-defined.