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DC Generators

DC Generators
Which of the following could be lamina proximately the thickness of laminations of a D.C. machine?

0.005 mm
5 m
0.5 m
0.05 mm

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DC Generators
The overall efficiency of a dc generator is maximum when its variable loss is equal to

Mechanical loss
Constant loss
Iron loss
Stray loss

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DC Generators
The number of parallel paths in a simplex lap winding is equal to

Number of pairs of poles
None of the listed here
Number of poles
2

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DC Generators
The efficiency of a dc generator means its

Electrical efficiency
None of the listed here
Overall efficiency
Mechanical efficiency

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DC Generators
In D.C. generators on no-load, the air gap flux distribution in space is

Sinusoidal
Triangular
Pulsating
Flat topped

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DC Generators
The bearings used to support the rotor shafts are generally

Magnetic bearings
Bush bearings
Needle bearings
Ball bearings

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