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DC Generators

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

Field
Brushes
Armature
Load

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DC Generators
The coupling field between electrical and mechanical systems of a dc machine is ______

Magnetic field
Electric field
None of the listed here
Both electrical and magnetic fields

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DC Generators
Permeance is the reciprocal of

Reluctance
Flux density
Ampere turns
Resistance

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DC Generators
Wave wound generators provide

More current and more voltage
Less current but more voltage
More current but less voltage
None of the listed here

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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
Carbon brushes
Graphite brushes
Metal graphite brushes

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

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

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