A 3-phase,4pole star connected turbo alternater has a cylindrical rotar. The reactance and resistance perphase of winding is 2.5 ohms and 0.15 ohms.The alternater has terminal potential difference of 6600V when delivering a current of250Amps. calculate a) The generated EMF at 0.6 PF laagging b)the regulation at 0.6 PFleading