Electrical Machines
In a DC generator the actual flux distribution depends upon

  clearance between tips of the adjacent pole shoes.
 size of air gap.
  all of above.
  shape of the pole shoe.

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Electrical Machines
No load primary current in a transformer

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

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