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DC Generators

DC Generators
A shunt generator gives its greatest voltage at

None of the listed here
Full load
No load
Half full load

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DC Generators
In a D.C. machine stray loss is the sum of

Shunt field copper loss and mechanical loss
Iron loss and mechanical loss
Armature copper loss and iron loss
Total copper loss and mechanical loss

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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
10 percent
5 percent
40 percent

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DC Generators
If the value of shunt field resistance of a shunt generator is greater than the critical resistance, the generator will

Excite to full voltage
Fail to excite
None of the listed here
Excite to one half of full voltage

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DC Generators
Which of the following components of a D.C, generator plays vital role for providing direct current of a D.C. generator?

Equalizer rings
Dummy coils
Commutator
Eye bolt

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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 ______

100
50
150
10

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