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Alternators

Alternators
In case of a uniformly distributed winding, the value of distribution factor is

0.85
0.76
0.995
0.65

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Alternators
Hydrogen is used in large alternators mainly to

Reduce eddy current losses
Strengthen the magnetic field
Cool the machine
Reduce distortion of waveform

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Alternators
For producing an emf of given frequency, an alternator will run at greatest speed for _____ poles.

4
8
2
12

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Alternators
Iron and friction losses of an alternator can be measured by a

Transformer
Rectifier
None of the listed here
Dc motor

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Alternators
The stator of an alternator is wound for _______on the rotor.

More number of poles than
None of the listed here
Less number of poles than
The same number of poles as

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Alternators
The rotor of a turbo alternator is made cylindrical in order to reduce_______

None of the listed here
Hysteresis loss
Windage loss
Eddy current loss

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