For a 4 pole, 3 phase, 50 Hz induction motor ratio of staler to rotor turns is 2. On a certain load, its speed is observed to be 1455 r.p.m. when connected to a 415 V supply. Then the value of
i) The frequency of rotor e.m.f. in running condition.
ii) The magnitude of induced e.m.f. in the rotor at standstill.
iii) The magnitude of induced e.m.f. in the rotor under running conditions. Assume star-connected stator.