The circuit diagram of a full wave rectifies:
A centre tap transformer and two identical divides D1 and D2 are used to diagram a full wave rectifies. The centre-tap transformer has 3 output terminals. Centre tap is C is always at OV.
Drawing positive half cycle of AC,A is +ve and B is −ve. For negative half cycle, B is + ve and A is - ve. So, when positive half cycle appears, A is +ve, B is −ve and c is O.
So, divide D1 is forward biased and divide D2 is reverse biased.
When negative half cycle appears,
A is -ve, B is + Ve and C is O
So, divide D2 is forward biased and divide D1 is reverse biased.
So, for each half cycle one divide conducts current through RL flows unidirectionally. Hence the voltage developed across RL is a DC.