Which device converts electrical energy into mechanical energy?

The device that converts electrical energy into mechanical energy is a motor. Motors operate based on electromagnetic principles, where an electric current flowing through a wire creates a magnetic field that interacts with other magnetic fields, resulting in motion. This is the fundamental operation of various types of motors, such as DC motors, AC motors, and stepper motors, all of which are designed to perform mechanical work.

In contrast, a transformer is used to change the voltage of an electrical current, typically for power transmission without involving mechanical motion. A generator, on the other hand, performs the opposite function of a motor by converting mechanical energy into electrical energy, commonly used in power generation. A rectifier converts alternating current (AC) to direct current (DC) but does not produce mechanical energy. Understanding these differences helps clarify why the motor is the correct answer, as its primary function is directly related to converting electrical input into mechanical output.