1.A 220 V, 3-phase, 4-pole, 50 Hz inductor motor of wound rotor type is supplied at ratedvoltage and frequency. The stator resistance, magnetizing reactance, and core loss arenegligible. The maximum torque produced by the rotor is 225% of full load torque and itoccurs at 15% slip. The actual rotor resistance is0.03 / phase. ?The value of externalresistance (in Ohm) which must be inserted in a rotor phase if the maximum torque is tooccur at start