Identify in which of the following case, Two quadrant chopper controlled fed separately excited DC motor takes electrical power from the power source. O Average voltage across armature is greater than back emf O Back emf is greater than the Source voltage across armature O Average voltage across armature is less than back emf O All given choices Three phase asynchronous motor requires three phase AC power supply for Stator winding and DC power supply for Rotor winding. Select one: O True O False