A half wave rectifier output depends on the filter capacitor for a long duration to provide DC output. This results in larger ripple and not suitable for higher current. A fullwave rectifier solves this by providing output for both negative and positive halfcycles. However it requires two out of phase AC inputs, generally provided by a transformer with a center tap.
Make a full wave rectifier, using two diodes. Two AC waveforms, differing by 180 degree in phase, are provided by the WG and outputs.
Adding capacitors to reduce the ripple is left as an exercise to the user. This experiment is only to demonstrate the working of a full wave rectifier, it cannot provide more than few milli amperes of current.
Why full-wave rectifier is superior to half-wave rectifier ?