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In an ac series motor, compensation winding is provided to | |
A. | neutralize the armature mmf. [Wrong Answer] |
B. | improve commutation and reduce sparking at the brushes. [Wrong Answer] |
C. | reduce reactance drop. [Wrong Answer] |
D. | reduce armature heating and vibrations. [Wrong Answer] |
E. | all of the above except (d). [Correct Answer] |