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QUESTIONS

DC Generators
The real working part of a dc machine is the ______

Field winding
Armature winding
Commutator
None of the listed here

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DC Generators
The coupling field between electrical and mechanical systems of a dc machine is ______

Both electrical and magnetic fields
None of the listed here
Electric field
Magnetic field

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DC Generators
The field coil of dc generator are usually made of

Mica
Copper
Carbon
Cast iron

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DC Generators
The resistance of armature winding depends on

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

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DC Generators
The armature of dc generator is laminated to

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

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