# Why does

1. Nov 9, 2011

### rytmenpinne

..fullwave bridge rectification raise the voltage *1.41? I scanned the net but I can't find an explanation as to why, only that it does..

2. Nov 9, 2011

### sandy.bridge

Remember, ac voltage is really regarding RMS voltage, and hence,
$$\sqrt{2}V_{rms}=V_p$$
where
$$\sqrt{2}=1.41.......$$

3. Nov 9, 2011

### rytmenpinne

Aah, so basicly what's going on here is that the secondary ratings on transformers is given in RMS? and not peak?

4. Nov 9, 2011

### Jiggy-Ninja

That's correct. Also note that a bridge rectifier will have the current passing through two diodes, so the output voltage will be 1.4 volts less than the peak.

5. Nov 9, 2011

### rytmenpinne

Good! thank you both! the world now makes sense again

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