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DC Generators

DC Generators
The commutator of a dc generator acts as

None of the listed here
An amplifier
A rectifier
A load

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DC Generators
The armature core of a D.C. generator is usually made of

Nonferrous material
Copper
Silicon steel
Cast-iron

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DC Generators
In a commutator

Mica is harder than copper
None of the listed here
Mica and copper are equally hard
Copper is harder than mica

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DC Generators
The armature of dc generator is laminated to

Reduce eddy current loss
Insulate the core
Reduce the bulk
Provide the bulk

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DC Generators
The main factor which leads to unstable parallel operation of flat and over compounded generators is

unequal speed regulation of their primemovers
unequal number of turns in their series field windings
unequal series field resistances
their rising voltage characteristics

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DC Generators
The resistance of armature winding depends on

All of the listed here
Length of conductor
Number of conductors
Cross sectional area of the conductor

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MORE MCQ ON DC Generators

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