DC Motor or Direct Current Motor Multiple Choice Questions and Answers
21. In a DC motor, unidirectional torque is produced with the help of .......
A.Brushes
B.Commutator
C.End-plates
D.Both brushes and commutator
✔ View Answer
D.Both brushes and commutator
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22. Which of the following quantity maintains the same direction whether a DC machine runs as a generator or a motor.......
A.Induced emf
B.Armature current
C.Field current
D.Supply current
✔ View Answer
A.Induced emf
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