The sparking at the brushes, in a DC machine, is due to
A. armature reaction.
B. reactance voltage.
C. presence of commutator.
D. high resistance of carbon brushes.
Answer:B
The sparking at the brushes, in a DC machine, is due to
A. armature reaction. B. reactance voltage. C. presence of commutator. D. high resistance of carbon brushes.