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DC Generators

DC Generators
The critical resistance of the D.C. generator is the resistance of

Brushes
Load
Field
Armature

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

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

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DC Generators
The voltage drop for which of the following types of brush can be expected to be least?

None of these
Graphite brushes
Carbon brushes
Metal graphite brushes

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DC Generators
The number of armature parallel paths in a two-pole D.C. generator having duplex lap winding is

8
4
6
2

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DC Generators
In D.C. generators, the brushes on commutator remain in contact with conductors which

Lie under South Pole
Lie under interpolar region
Are farthest from the poles
Lie under North Pole

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DC Generators
The commutator of a dc generator acts as

An amplifier
None of the listed here
A rectifier
A load

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