Question

For this circuit: Show that the assumption D1 off and D2 off is an inconsistent assumption. Show that the assumption Dl on and D2 on is an inconsistent assumption D2 10 V -

Answer 1

If both diodes D_1 and D_2 Assumed to be OFF means both Reverse biased means V_A > V_B and V_A > V_C There is no way such that V_A is creator than V_B and V_C both \r\n since If both D_1 and D_2 Assumed OFF {option c k t} Instead of V_A > V_B and V_A > V_C V_A < V_B V_A < V_C} rightarrow False Assumption is In consistent \r\n If both diodes D_1 and D_2 ON {Forward bias} V_A < V_B and V_A < V_C But again this will be invalid for D_1 and D_2 forward Bias Diodes short circuit V_A = V_C = 3 V and V_A < V_B Therefore Assumption false or in valid