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DC Generators

DC Generators
The armature of a dc machine is made of ______

Cast steel
Wrought iron
Silocon steel
Soft iron

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DC Generators
______ dc machine are most common.

6 pole
2 pole
8 pole
4 pole

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

Carbon
Cast iron
Copper
Mica

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DC Generators
The current in armature conductors of a dc machine is ______

Pulsating dc
Ac
Pure dc plus pulsating dc
Pure dc

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DC Generators
The armature winding of a dc machine is place on the rotor to ______

Save iron
Facilitate commutation
Reduce armature reaction
Reduce losses

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DC Generators
In a D.C. generator the ripples in the direct e.m.f. generated are reduced by

Using carbon brushes of superior quality
Using conductor of annealed copper
Using equalizer rings
Using commutator with large number of segments

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