Small dc motors vary in size, but are typically about the size of a AA battery. For small dc motor, the most common type is the brushed dc motor. These motors have a commutator and brushes that contact the rotating armature to create a rotating magnetic field.

The armature is connected to the shaft, which turns the load. The speed of a brushed dc motor is controlled by the voltage applied to the armature. The torque of a brushed dc motor is proportional to the current flowing through the armature. Brushed dc motors are simple and rugged, but they are not very efficient.

The brushes create friction and wear out over time. Brushless dc motors are more efficient, but they are more expensive and require more complex electronics to control the motor. Small dc motors are used in a wide variety of applications. They are often used in toys, tools, and appliances.