Q
To avoid formation of grooves in the commutator of a D.C. machine?
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A
A. The brushes of opposite polarity should track each other
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B
B. The brushes of same polarity should track each other
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C
C. Brush position has no effect on the commutator grooving
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D
D. None
Correct Answer:
A. A. The brushes of opposite polarity should track each other
