Electrical Machines
A slip ring Induction motor runs at 290 rpm at full load, when connected to 50 Hz supply. Determine the number of poles and slip.

  P = 50, s = 4.43 %.
  P = 40, s = 5.79 %.
  P = 20, s = 3.33 %.
  P = 60, s = 0.96 %.

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