Electrical Machines
The rotor winding for a 3-phase slip-ring induction motor having delta-connected stator must be connected in

  delta.
  star.
None of these
  delta or star according to need.

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Electrical Machines
What will happen if the the supply terminals are reversed in case of a DC shunt motor?

 The motor will run much faster in the same direction.
 The motor will run at its normal speed in the same direction as before.
 The motor will stop.
 The motor will run in reverse direction.

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Electrical Machines
In a 3 - Φ induction motor

  power factor at starting in the same as that while running.
  power factor at starting is low as compared to that while running.
  power factor at starting is high as compared to that while running.
  none of them.

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