# To make a full wave rectifier using these four diodes, the ac input should be applied across what?

Wrong answer. Input AC should be connected across PQ and load should be connected across AB.
A full wave-rectifier uses four diodes to reverse the polarity of the negative half of the input voltage waveform while preserving the polarity of the positive half.
The input should be applied across AB and the output taken across PQ.

A full wave-rectifier uses four diodes to reverse the polarity of the negative half of the input voltage waveform while preserving the polarity of the positive half.
The input should be applied across AB and the output taken across PQ.