The number of brushes in a commutator depends on______________?
Correct answer: D. amount of current to be collected
- A. speed of armature
- B. type of winding
- C. voltage
- D. amount of current to be collected
Explanation
The number of brushes is selected mainly according to the armature current that must be collected, since multiple brushes reduce current per brush and current density. Speed, voltage and winding type do not primarily determine the number of brushes.
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