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Alternators

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

Unity
Leading
Zero
Lagging

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Alternators
In huge alternators, the moving part is

Brushes
Armature
None of the listed here
Poles

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Alternators
The efficiency of the turbo-alternator _____ with increases in speed.

Decreases
Remians unchanged
None of the listed here
Increases

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Alternators
In an alternator, the effect of armature reaction is minimum at power factor of ______

0.5 lagging
0.866 lagging
0.866 leading
Unity

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Alternators
The rating of an alternator is expressed in______

kW
kVAR
kVA
HP

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Alternators
In an alternator, for a coil having a span of 2/3 of pole pitch, the coil span factor will be

0.707
0.2
0.6
0.866

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