Induction motors are known as asynchronous motors because the induced EMF and the rotating torque that comes with it can exist only when the rotor's speed lags behind the RMF. Such motors are ...

The arrow shows the direction ... to the rotor, to the speed of the magnetic field created by the induced current is called slip. This difference in speeds is why an induction motor is often ...

As it turns out in the case of a DC motor, when the armature rotates through the magnetic field, an induced voltage opposite in polarity to the applied voltage is created — called counter EMF ... be ...