Whenever the armature of an electric motor is moving, both the motor action and generator action are occurring simultaneously; the electromagnetic force produced by generator action opposes the desired motor action and effectively creates a variable motor resistance which increases with motor speed. When a voltage is applied to the motor, this resistance dictates the current drawn by the motor.
When the armature of an electric motor moves, both motor action and generator action take place; the electromagnetic force from generator action opposes the intended motor action and creates a variable motor resistance that increases with motor speed. Applying voltage to the motor makes this resistance determine the current drawn by the motor.