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Alternators

Alternators
In huge alternators, the moving part is

Poles
None of the listed here
Armature
Brushes

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Alternators
In an alternator, the armature reaction will be completely magnetizing in case the load power factor is

Zero lagging
Zero leading
Unity
0.866

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Alternators
When the speed of an alternator is reduced by half, the generated emf will become

Half
Twice
Four times
One-fourth

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Alternators
An alternator supplying power to a load with a leading power factor always has ______ voltage regulation.

Positive
Zero
Negative
Unity

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Alternators
Zero power factor method for alternator is generally used to determine

Synchronous impedance of alternator
Voltage regulation of the alternator
Efficiency of alternator
None of the listed here

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Alternators
The magnitude of emf generated by an alternators depends on ______

Number of poles
Flux per pole
Rotor speed
All of the listed here

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MORE MCQ ON Alternators

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