In order to neutralize armature mmf perfectly under the pole shoe, the ampere-conductors of compensating winding must be (pole arc/pole pitch=1) _______

• A. Not equal to the total armature ampere conductors under the pole shoe
• B. Equal to the total armature ampere conductors under the pole shoe
• C. Half of the total armature ampere conductors under the pole shoe
• D. Twice of the total armature ampere conductors under the pole shoe