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
DC Generators » Exercise - 13. In D.C. generators the pole shoes are fastened to the pole core by : (a) rivets (b) counter sunk screws (c) brazing (d) welding
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 Motors » Exercise - 1 1. The direction of rotation of a D.C. series motor can be changed by : (a) interchanging supply terminals (b) interchanging field terminals (c) either of (a) and (b) above (d) None of the above
Transformer » Exercise - 18. If the primary power of an ideal transformer having a 2:1 voltage ratio is 100 W, the secondary power is : (a) 50 W (b) 75 W (c) 100 W (d) 200 W