Full wave bridge rectifier -
Rectifier is a circuit which convert alternating voltage into the direct voltage.
There are three types of rectifier circuit

Full wave bridge rectifier
Full wave bridge rectifier convert sinusoidal ac voltage into pulsating dc voltage.bridge rectifier  conduct in both half cycle of applied ac voltage i.e for positive and negative half cycle of ac voltage unlike half wave rectifier which conduct on only one half cycle at a time

Construction of full wave bridge rectifier
Construction of bridge rectifier is simple,it supplied with ac source and  uses four diode D1,D2,D3,D4 which connects in antiparallel manner
to form  bridge.

Connection digarm show in below  figure

Working principle of full wave bridge rectifier
At the positive half cycle of applied ac voltage  .diode D1, D3 are forward biase, diode and diode D2,D4 reverse biase hence diode D1,D3 conduct in first positive half cycle because diode conduct only in forward biase i.e when voltage  applied from anode to cathode.due to this. For first positive half cycle   D1 D3 conduct and delivery voltage at output terminal .in below circuit we connected 1 kilo ohm resistor .

During Negative half cycle of ac voltage :
When opposite polarity of ac voltage means for Negative half  diode D1, D3 becomes reverse biased and D2 D4 are forward biase so diode D2 D4 conduct in negative half cycle producing output and delivery pulsating dc output at load .
Full wave bridge rectifier conduct on other half cycle of ac voltage and we get continues output in both conducting half cycle of applied ac voltages