A. any even number of conductors
B. any odd number of conductors
C. that even number which is exact multiple of poles + 2
D. that even number which is exact multiple of poles
A. slots
B. armature conductors
C. winding elements
D. poles
A. is always present
B. is always absent
C. may be sometimes present
D. none of the above
A. external current
B. armature current
C. shunt current
D. load current
A. field
B. brushes
C. armature
D. load
A. 40 percent
B. 25 percent
C. 10 percent
D. 5 percent
A. rising voltage characteristics
B. identical voltage characteristics
C. drooping voltage characteristics
D. linear voltage characteristics
A. to increase the speed and hence generated e.m.f.
B. to increase the series flux
C. so that two similar machines will pass approximately equal currents to the load
D. to reduce the combined effect of ar-mature reaction of both machines
A. their rising voltage characteristics
B. unequal number of turns in their series field windings
C. unequal speed regulation of their primemovers
D. unequal series field resistances