A Rectifier circuit is a circuit that changes the current from AC to DC at the Load.
When the AC current is segmented by the diodes due to their configuration in the circuit (only letting current flow in one direction), only the positive peaks will appear, making a positive signal that oscillates up and down only in the positive voltage domain.
this creates a constantly interrupted signal as its not a constant DC voltage, yet.
The capacitor discharges when the DC signal starts to drop and overcompensate the signal by adding onto the current. it in order to make it more even. This causes a ripple voltage
The higher the capacitance = The lower the Ripple voltage when the capacitor discharges.
