Question
Draw the circuit diagram of a full wave rectifier using two $p-n$ junction
diodes. Explain its working and show input and output voltage variations.
diodes. Explain its working and show input and output voltage variations.
✓
Answer
For $+ve$ half cycle of $AC$ input, terminal $A$ or transformer $T$ will be as low voltage relative centre tap terminal $C B$ at high voltage.
So, $D^1$ will be reverse biased $D^2$ will be forward biased.
Diode $D^2$ conducts to give an output across $RL$ through $M$.
For $–ve$ half cycle of input $AC, A$ will be at high voltage $B$ will be at low voltage to make $D^1$ forward and $D^2$ reverse biased. $D^1$ conducts to give an output across $RL$ with same polarity.
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