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To have sparkless commutation, the armature reaction effect in a dc machine is neutralized by | |
A. | compensating winding and commutating poles. [Correct Answer] |
B. | shifting the brush axis from geometrical neutral axis to magnetic neutral axis. [Wrong Answer] |
C. | fixing the brush axis in line with the pole axis. [Wrong Answer] |
D. | increasing the field excitation. [Wrong Answer] |