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DC Generators

DC Generators
Small dc machines generally have _____ poles.

6
4
2
8

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DC Generators
The no load voltage of a generator is 240 V and rated load voltage is 220 V. The voltage regulation of the generator is

4.5%
9.1%
11.3%
2.8%

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DC Generators
In D.C. generators, current to the external circuit from armature is given through

None of above
Slip rings
Commutator
Solid connection

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DC Generators
As a result of armature reaction, the reduction in the total mutual air gap flux in a D.C. generator is approximately

25 percent
40 percent
10 percent
5 percent

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DC Generators
The number of brushes in a commutator depends on

Amount of current to be collected
Speed of armature
Voltage
Type of winding

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DC Generators
In dc generator, the constant losses is equal to

Mechanical losses
None of the listed here
Stray losses
Stray losses plus shunt cu loss

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