(i) Plot the O.C.C. for 375 r.p.m. and determine the voltage to which the machine will excite if the field resistance is 40 Q. (ii) Determine the load current supplied by the generator when its terminal voltage is 200 V. Take armature resistance 0.3 Q. Assume speed to be constant and ignore armature reaction. (iii) What additional resistance would have to be inserted in the field circuit to reduce the voltage to 200 V at 375 r.p.m. (no-load).