To avoid formation of grooves in the commutator of a D.C. machine?
Athe brushes of same polarity should track each other
Bbrush position has no effect on the commutator grooving
CNone
Dthe brushes of opposite polarity should track each other
Correct answer
D. the brushes of opposite polarity should track each other
Explanation
The correct answer is the brushes of opposite polarity should track each other.