For the network shown in Figure R-2 k2, the dc value of the the output voltage is a) 12.7 V c) 76.3 V e) 40.0 V b) 25.4 V d) 80.0 V 120 V -120 V Ideal diodes R R If I=1.0 A in the circuit segment shown, what is the potential difference V-VB? A a) + 10 V. b) - 10 V c) +20 V. d) - 20 V. e) +30 V 1 20 V 10 52 +1+B 10 V