Related Questions

How many flowers are there if all of them are roses except two, all of them are tulips except two and all of them are daisies except two?
A 3
B 6
C 9
D 10
How many flowers are there if all of them are roses except two , all of them are tulips except two and all of them are daisies except two?
A 3
B 6
C 9
D 10
The losses occurring in a D.C. generator are given below. Which loss is likely to have highest proportion at rated load of the generator?
A Hysteresis loss
B Field copper loss
C Armature copper loss
D Eddy current loss
In a D.C. generator, the iron losses mainly take place in
A Yoke
B Commutator
C Armature conductors
D Armature rotor
The terminal voltage of a D.C. shunt generator drops on load because of all of the following reasons except
A Armature reaction
B Armature resistance drop
C Field weakening due to armature reaction and armature
D Commutation
In a D.C. generator in order to reduce sparking at brushes, the self-induced e.m.f. in the coil is neutralized by all of the following except
A Interpoles
B Dummy coils
C Compensating winding
D Shifting of axis of brushes
Which of the following losses are significantly reduced by laminating the core of a D.C. generator?
A Hysteresis losses
B Eddy current losses
C Copper losses
D Windage losses
Which of the following components of a D.C, generator plays vital role for providing direct current of a D.C. generator?
A Dummy coils
B Commutator
C Eye bolt
D Equalizer rings
The e.m.f. generated by a shunt wound D.C. generator is E. Now while pole flux remains constant, if the speed of the generator is doubled, the e.m.f. generated will be
A $$\frac{{\text{E}}}{2}$$
B 2E
C Slightly less than E
D E
A separately excited generator as compared to a self-excited generator
A Is amenable to better voltage control
B Is more stable
C Has exciting current independent of load current
D Has all above features

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