DC Generators » Exercise - 14. In D.C. generators, the cause of rapid brush wear may be : (a) severe sparking (b) rough commutator surface (c) imperfect contact (d) any of the above
DC Generators » Exercise - 1 1. The armature of D.C. generator is laminated to : (a) reduce the bulk (b) provide the bulk (c) insulate the core (d) reduce eddy current loss
Stepper Motors » Exercise - 14. A stepper motor may be considered as a .................. converter. (a) dc to dc (b) ac to ac (c) dc to ac (d) digital-to-analogue