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DC Generators

DC Generators
Current versus time graph for an ideal commutation is a

None of the listed here
Hydrobola
Parabola
Straight line

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DC Generators
A 6 pole lap wound generator has 300 conductors, the emf induced per conductor being 5 V. The generated voltage of the generator is _____

1500 V
250 V
60 V
360 V

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DC Generators
Open circuited armature coil of a D.C. machine is

None of these
Identified by the scarring of the commutator segment to which open circuited coil is connected
Both of the listed here
Indicated by a spark completely around the commutator

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DC Generators
In lap winding, the number of brushes is always

Same as the number of poles
Double the number of poles
Two
Half the number of poles

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DC Generators
Which of the following will not prevent a self excited shunt generator from building upto its full voltage?

No residual magnetism
Speed too high
Open field
Wrong direction of rotation

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DC Generators
Which of the following generating machine will offer constant voltage on all loads?

All of these
Level compounded generator
Self-excited generator
Separately excited generator

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