In a D.C. machine the number of brush arms is _________ the number of poles?
Correct answer: B. equal to
- A. less than
- B. equal to
- C. greater than
- D. none of the above
Explanation
In the usual simplex lap-wound D.C. machine, one brush arm is provided for each pole, so the number of brush arms equals the number of poles. This arrangement gives the required parallel paths in the armature winding.
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