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DC Generators

DC Generators
Permeance is the reciprocal of

Flux density
Resistance
Reluctance
Ampere turns

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DC Generators
The armature conductors of a 6 pole, lap wound dc generator are divided into

3 parallel paths
4 parallel paths
6 parallel paths
2 parallel paths

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DC Generators
The rapid wear of brushes takes place due to

Abrasion from dust
Rough commutator bars
Excessive spring pressure
All of these

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DC Generators
In a lap winding, the number of the brushes required is equal to

None of the listed here
Number of poles
Number of pairs of poles
Commutator pitch

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DC Generators
A sinusoidal voltage of 5 Hz is applied to the field of a shunt generator. The armature voltage wave

will be of 5 Hz
will be of 5 xiVHz
will be zero
will be of v Hz 5

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DC Generators
Dc machines which are subjected to abrupt changes of load are provided with

Equalisers
Interpole windings
Compensating windings
Copper brushes

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