Two d.c. generators are connected in parallel to supply a load of 1500 A. One generator has an armature resistance of 0.5 Ω and an e.m.f. of 400 V while the other has an armature resistance of 0.04 Ω and an e.m.f. of 440 V. The resistances of shunt fields are 100 Ω and 80 Ω respectively. Calculate the currents I1 and I2 supplied by individual generator and terminal voltage V of the combination. [381.2 V, 12.88 kW, 558.9 kW]

Three single phase transformers each having a 240 V primary and two 250 V secondaries, as shown in the figure below, is to be connected to a 400 V, 3–phase supply to give a six phase output. A d e В f Show how this is done and find the voltage between adjacent phases of the 6-phase output.

Complete the wiring diagrams as per Worksheets 3-A and 3-B then solve for A through N for  DC generator on Worksheets 3-A and 3-B when it is running at capacity and its specifications are as follws:Rated output = 2000 wats @125 voltsArmature Resistance = 0.3 ohms(Ω)Shunt Field Resistance = 50 ohms(Ω)Series Field Resistance = 0.6 ohms(Ω)Rheostat Resistance = 12.5 ohms(Ω)A) Voltage drop of series field (IR-series)a) 5.45 V b) 9.6 V c) 26.92 V d) 107.68 VB) Power consumed by series field (P-series)a) 57.78 W b) 98.83 W c) 153.6 W d) 231.13 WC) Power consumed by rheostat (P-rheostat)a) 57.78 W b) 98.83 W c) 153.6 W d) 231.13 WD) Power consumed by shunt field (P-shunt)a) 57.78 W b) 98.83 W c) 153.6 W d) 231.13 WE) Power consumed by armature resistance (P-arm)a) 57.78 W b) 98.83 W c) 153.6 W d) 231.13 WF) Resistance of the load (R-load)a) 7.8 Ω b) 9.6 Ω c) 11.3 Ω d) 15.0Ω G)percent efficiency of the machine(% eff) a)66.5%, b)78.7%, c)86.2%, d)103.4%