In electrical devices, rotary motion is typically produced by which component?

In electrical devices, rotary motion is primarily produced by a motor. Motors are specifically designed to convert electrical energy into mechanical energy, facilitating rotational movement. This process typically occurs through the interaction of magnetic fields and electric currents within the motor's components, resulting in a mechanical output that can perform various tasks, such as turning a fan, driving a pump, or powering an automotive engine.

Alternatives like generators and transformers serve different functions. While generators do involve rotary motion to convert mechanical energy into electrical energy, their primary role is to generate electricity rather than produce rotary motion as an output. Transformers, on the other hand, are used to change voltage levels in AC circuits without producing motion at all. Resistors serve to limit electrical current and dissipate energy as heat, but they do not facilitate any form of motion. Therefore, within the context of producing rotary motion, the motor is the appropriate choice.