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DC Generators

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

Carbon
Copper
Mica
Cast iron

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DC Generators
The brush voltage drop in dc machine is about _______

0.1 V
2 V
20 V
10 V

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DC Generators
Which of the following generator provides approximately constant voltage from no load to full load?

Series
Flat compounded
Shunt
Over compounded

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DC Generators
The armature of a dc machine having 10 poles is rotating at a speed of 10 revolution per second. The number of hysteresis loops formed per second is ______

50
150
100
10

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DC Generators
In case of dc machines, mechanical losses are primary function of

Speed
Voltage
None of the listed here
Current

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DC Generators
The armature of dc generator is laminated to

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

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