Electrical Machines
A 250 volt dc series motor having an armature resistance of 0.2 Ω takes a load current of 60 A. What will be the torque produced at the shaft of the motor? Consider brush drop of 1V.

 266.20 N-m.
 234.76 N-m.
 can not be determined.
 133.22 N-m

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Electrical Machines
Slip speed is the

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

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