In a D.C. generator in order to reduce sparking at brushes, the self-induced e.m.f. in the coil is neutralised by all of the following except______________?

A. increase
B. decrease
C. remain unaffected
D. fluctuate heavily

A. Series generator
B. Shunt generator
C. Over compound generator
D. Flat compound generator

A. imperfect brush contact
B. field resistance less than the critical resistance
C. no residual magnetism in the generator
D. faulty shunt connections tending to reduce the residual magnetism

A. there is no load on|he generator
B. the generator runs on full load
C. the generator runs on overload
D. the generator runs on designed speed

A. Series field
B. Compensating field
C. Inter pole field
D. Shunt field

A. number of armature coils
B. number of armature coil sides
C. number of armature conductors
D. number of armature turns