Electrical Machines
Scott connections are used for

 single phase to three phase transformation.
 three phase to single phase transformation.
 three phase to two phase transformation.
 any of the above.

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Electrical Machines
Slip speed is the

  half of the sum of synchronous and rotor speeds.
  sum of synchronous and rotor speeds.
  difference of synchronous speed and actual rotor speed.
  difference of actual rotor speed and synchronous speed.

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