Does a Rectifier Change Voltage?

Rectifiers in power supply circuits convert AC to DC from different power supplies. This is useful as DC is generally sent across long distances before it is converted to AC for household electricity and electronic devices. These technologies make great use of the bridge rectifier that can handle the change in voltage.

Do rectifiers reduce voltage?

This reduces output voltage, and limits the available output voltage if a very low alternating voltage must be rectified. ... Peak loss is very important for low voltage rectifiers (for example, 12 V or less) but is insignificant in high-voltage applications such as HVDC power transmission systems.

Why does voltage increase after rectification?

The rectified AC waveform catches the peaks. The input 9VAC is RMS ( Root-Mean-Square average) equivalent -- the actual amplitude of the sinewave is about 40% higher than the RMS average (square root of 2 is 1.414). So on your picture the 9V equivalent is about 70% of the way between 0V and the peaks.