Electrical Machines
If an induction machine is run at above the synchronous speed it acts as

None of these
 an induction generator
 a synchronous motor
 an induction motor

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Electrical Machines
The results of a slip test for determining direct axis (Xd) and quadrature axis (Xq) reactances of a star connected salient pole alternator are given below Phase values: Vmax = 108 V ; Vmin = 96 V Imax = 12 A ; Imin = 10 A Hence the two reactances will be

 Xd = 10.8Ω and Xq = 8Ω
 Xd = 8Ω and Xq = 10.8Ω
 Xd = 9.6Ω and Xq = 9Ω
 Xd = 9Ω and Xq = 9.6Ω

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Electrical Machines
Slip speed is the

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

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