A separately excited dc generator, running at constant speed, supplies a load having a 1-Ω resistance in series with a 1-H inductance. The armature resistance is 0.1 Ω and its inductance is negligible. The field, having a resistance of 50 Ω and an inductance of 5 H, is suddenly connected to a 100-V source. Determine the armature current buildup as a function of time, if the generator voltage constant Kg = 50 V per field ampere at rated speed.