RMS Voltage with a DC Offset: What is the Impact?

[flash]

I have a question about RMS voltage. I know Vrms is Vpeak/sqrt(2) if the sine wave is centered around 0V, but what if the voltage has a DC offset? Shouldn't this mean the RMS voltage is more?

 

[Dick]

Sure. It's the square root of the sum of the squares of DC and AC.