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Alternators

Alternators
When load on an alternator is increased, the terminal voltage increases if the load pf is ______

Zero
Leading
Lagging
Unity

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Alternators
The speed of a salient pole machine is nearly

1500 rpm
3000 rpm
500 rpm
1000 rpm

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Alternators
The power factor of an alternator is determined by its

Speed
Excitation
Load
Primemover

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Alternators
The speed of an alternator is changed from 3000 rpm to 1500 rpm. The generated emf/phase will become

Unchanged
Half
One fourth
Double

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

Transformer
Dc motor
None of the listed here
Rectifier

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Alternators
In an alternator one of the advantages of distribution the winding is to

None of the listed here
Reduce noise
Save on copper
Improve voltage wavefrom

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