31. A series generator can self-excite
32. The armature of D.C. generator is laminated to
33. The material for commutator brushes is generally
34. Armature coil is short circuited by brushes when it lies
35. Satisfactory commutation of D.C. machines requires
36. A D.C. generator can be considered as
37. In case of a flat compounded generator
38. The e.m.f. generated in a D.C. generator is directly proportional to
39. A 220 V D.C. generator is run at full speed without any excitation. The open circuit voltage will be
40. If B is the flux density, I the length of conductor and v the velocity of conductor, then induced e.m.f. is given by
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