Ao Coil 1 elle Coil 2 Bo The figure above shows coils-1 and 2, with dot markings as shown, having 4000 and 6000 turns respectively. Both the coils have a rated current of 25 A. Coil-1 is excited with single phase, 400 V, 50 Hz supply. D The coils are to be connected to obtain a single-phase, 1000 V, auto-transformer to drive a load of 10 kVA. Which of the options given should be exercised to realize the required auto-transformer? (A) Connect A and D; Common B (C) Connect A and C; Common B (B) Connect B and D; Common C (D) Connect A and C; Common D