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

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

< 1 2 3 4 5