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DC Generators

DC Generators
Small dc machines generally have _____ poles.

2
6
4
8

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DC Generators
The copper loss is constant for

Both shunt and compound generator
None of the listed here
Shunt generator only
Series generator only

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

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

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DC Generators
If residual magnetism is present in a D.C. generator, the induced e.m.f. at zero speed will be

Small
Zero
High
The same as rated voltage

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DC Generators
The overall efficiency of a dc generator is maximum when its variable loss is equal to

Stray loss
Mechanical loss
Constant loss
Iron loss

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DC Generators
In D.C. generators, current to the external circuit from armature is given through

Solid connection
Slip rings
None of above
Commutator

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