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Alternators

Alternators
Copper losses of an alternator can be measured by

None of the listed here
Transformer
Rectifier
Dc motor

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Alternators
For the same rating, the size of low speed alternator is ______that of high speed alternator.

Less than
More than
About the same as
None of the listed here

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Alternators
Modern 3-phase alternator of a central power station will have generated voltage of

11 kV
230 V
400 V
132 kV

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Alternators
Three phase alternators are invariably star commected because

Magnetic losses are the minimum
Less turns of wire are required
Small conductors can be used
Higher terminal voltage is obtained

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Alternators
Where the terminal voltage of an alternator falls on throwing of the load, it indicates that the load is purely

Inductive
Resistive
Capacitive
None of the listed here

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

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

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