(a) The nature of biasing (b) Diagram of full wave rectifier Working (a) Reverse Biased (b) Diagram of full wave rectifier Working: The diode $D_1$ is forward biased during one half cycle and current flows through the resistor, but diode $D_2$ is reverse biased and no current flows through it. During the other half of the signal, $D_1$ gets reverse biased and no current passes through it, $D_2$ gets forward biased and current flows through it. In both half cycles current, through the resistor, flows in the same direction.