The electric motor parts include rotors, which are cylindrical components that rotate inside the motor and are connected to the shaft. Rotors are made up of a series of coils that create a magnetic field when an electric current is passed through them. This magnetic field interacts with the stator, another part of the motor, to create motion. Rotors are essential for the operation of electric motors, as they are responsible for generating the torque needed to turn the motor shaft.