Electrical Machines
In a DC shunt generator working on load, the brushes are moved forward in the direction of rotation, as a result of this, commutation will

 improve but terminal voltage will fall.
  improve and terminal voltage will rise .
  worsen and terminal voltage will fall
  worsen and terminal voltage will rise.

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Electrical Machines
Where the shunt generators are widely used?

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

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