Electrical Machines
In synchronous motor, the damper winding is generally used to

  provide starting torque only.
  reduce noise level only.
  prevent hunting and provide the starting torque.
  reduce the eddy currents.

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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

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

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