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GATE Electrical 2014 Set 1 | Question: 38

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A $3$ phase, $50$ $Hz$, six pole induction motor has a rotor resistance of $0.1\: Ω$ and reactance of $0.92\: Ω$. Neglect the voltage drop in stator and assume that the rotor resistance is constant. Given that the full load slip is $3\%$, the ratio of maximum torque to full load torque is

  1. $1.567$
  2. $1.712$
  3. $1.948$
  4. $2.134$

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