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DC Generators

DC Generators
In a D.C. generator the critical resistance refers to the resistance of

Brushes
Load
Field
Armature

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DC Generators
The effect of armature reaction is to

Make the air gap flux uniform
Decrease the total flux
Increase the total flux
None of the listed here

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DC Generators
A 4-pole dc machine has _____ magnetic circuits.

4
6
8
2

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DC Generators
A separately excited generator as compared to a self-excited generator

Has all above features
Is amenable to better voltage control
Is more stable
Has exciting current independent of load current

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DC Generators
In a short shunt compound wound generator, the shunt field is connected in parallel with

Series field
Parallel combination of armature and series field
Series combination of armature and series field
Armature

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DC Generators
The yoke of a dc machine carries ______ pole flux.

Two times the
One-half of
None of the listed here
Three times

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