Electrical Machines
In a loaded DC generator, if the brushes are given a shift from the interpolar axis in the direction of rotation, then the commutation will

 improve with rise in terminal voltage.
 deteriorate with rise in terminal voltage.
 improve with fall of terminal voltage.
 deteriorate with fall of terminal voltage.

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Electrical Machines
Where the shunt generators are widely used?

 Where the load is very high.
  Where a constant voltage is required over a narrow load range.
 Where often load fluctuation is occurred.
 Where voltage variation is needed over a wide load range.

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