A. commutator
B. solid connection
C. slip rings
D. none of above
A. speed
B. load
C. voltage
D. speed and voltage
Iron losses in a D.C. machine are independent of variations in______________? Read More »
D.C. Generators A. speed
B. load
C. voltage
D. speed and voltage
Iron losses in a D.C. machine are independent of variations in_____________? Read More »
D.C. Generators A. reduce the bulk
B. provide the bulk
C. insulate the core
D. reduce eddy current loss
The armature of D.C. generator is laminated to_______________? Read More »
D.C. Generators A. case iron
B. carbon
C. silicon steel
D. stainless steel
Laminations of core are generally made of________________? Read More »
D.C. Generators A. 0.005 mm
B. 0.05 mm
C. 0.5 m
D. 5 m
A. copper lugs
B. resistance wires
C. insulation pads
D. brazing
The commutator segments are connected to the armature conductors by means of___________? Read More »
D.C. Generators A. length of conductor
B. cross-sectional area of the conductor
C. number of conductors
D. all of the above
The resistance of armature winding depends on Read More »
D.C. Generators A. mica
B. copper
C. cast iron
D. carbon
The field coils of D.C. generator are usually made of_____________? Read More »
D.C. Generators A. copper is harder than mica
B. mica and copper are equally hard
C. mica is harder than copper
D. none of the above
In a commutator_____________? Read More »
D.C. Generators