An 1100 V. 50 Hz star connected induction motor has a starconnected slip-rings rotor with a transformation ratio of 3.0. Therotor resistance per phase is 0.015 ohm and leakage inductance is0.8 mH per phase . Neglect stator impedence .Find
(a) The rotor starting current per phase with slip ringsshort-circuited.
(b) The rotor power factor at starting .
(c) The external resistance per phase to obtain a startingcurrent of 120 A. in the stator.
(d) The rotor current at 4% slip.
(e) The rotor power factor at 4% slip.