This is a center tapped full wave rectifier . From my understanding if D1=D1 = forward bias and D2=reverseD2 = reverse bias during the positive cycle of AC, why does VD1 from the graph shows thatshow 0 voltage during the positive cycle and negative voltage during the negative cycle? Shouldn't it be the opposite ??
Original Image: https://i.sstatic.net/LF98c.jpg