Electrical Machines
In a DC machine, which of these parameters remain the same whether it runs as a DC motor or a DC generator?

 Can not be determined.
 Armature current.
 Mechanical power.
 Induced emf.

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Electrical Machines
No load primary current in a transformer

 lags behind applied voltage somewhat less than 90Ã
 leads the applied voltage somewhat less than 90Ã&
 leads the applied voltage by exactly 90Â&
 lags behind applied voltage by exactly 90Â&am

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