Full Wave Bridge Rectifier

In A full wave bridge rectifier both the cycles of the ac input are used. During the positive half cycle of secondary voltage, the end P of the secondary winding becomes positive and the end Q negative. This makes diode D1 and D3 forward biased while diodes D2 and D4 are reverse biased. Therefore, only diodes D2 and D3 conduct. These two diodes will be in series through the load resistance RL. the conventional current flows from A to B through the load resistance RL. dc output is obtained across RL. During the negative half cycle of secondary voltage, end P becomes negative and end Q positive. This makes diodes D2 and D4 forward biased where D1 and D3 are reverse biased. Therefore, only diodes D2 And D4 conduct. These two diodes will be in series through the load resistance RL . The conventional current flows from A to B through the load resistance RL. The dc output is obtained across RL.