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DC Generators

DC Generators
The critical resistance of the D.C. generator is the resistance of

Brushes
Armature
Load
Field

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DC Generators
The voltage drop for which of the following types of brush can be expected to be least?

None of these
Metal graphite brushes
Carbon brushes
Graphite brushes

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DC Generators
D.C. generator generally preferred for charging automobile batteries is

Shunt generator
Any of the above
Long shunt compound generator
Series generator

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DC Generators
In a commutator

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

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

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

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DC Generators
The insulating material used between the commutator segments is normally

Paper
Insulating varnish
Mica
Graphite

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