Electrical Machines
In a star - delta starting of an IM

  line voltage is 57.7 % of stator voltage.
  reduced voltage is applied to the stator.
  applied voltage per stator phase is 57.7 % of a line volt
  resistance is inserted in the rotor.

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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

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

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