Q/A230u Sepeiately-exaled de generator has the followingeccharactenstics when run at looe Lield CA). 1.5. 0.5 2-0 2.5 3. 4. lelkage 60 lo 120 170:210 24o 266 275 285 The Full load Current is 500A, the resistance of armadue Is D.022 ik the oirmature Veaction effect reduce the Field by 5% amd the speed of the piime molex also Ealls by 3% Find the value of the field Current to mantain temanal nd, Veltage of 230 on full load

In a certain sub-station, there are 5 d.c. shunt generators in parallel, ench having an armature resistance of 0.1 0, running at the same speed and excited to give equal inducnd emfs Each generator supplies an equal share of a total load of 250 kW at a terminal voltage of 500 V into a load of fixed resistance. If the field current of one generator is raised by 4%, the others remaining unchanged, calculate the power output of each machine and their terminal voltages under these conditions Assume that the speeds remain constant and flux is proportional to field current

A 6 pole DC lap wound generator has 41 armature conductors with flux per pole is 23 mWb and the e.m.f generated is 80 V, then the speed of the machine is O 0.74 rps O 84.84 rps O 7.43 rps 84.84 rps

1. Sinewave A lags sinewave B by 30°. Both have peak values of 15V. Sinewave A is the reference with a positive going crossing at 0°. Determine the instantaneous value of sinewave B at 30°, 45⁰, and 200⁰.