# Homework Help: Vrms for offset sine wave

1. Sep 25, 2015

### Ardec

1. The problem statement, all variables and given/known data
The rms voltage for a sine wave with zero offset is given by Vrms= 1/(√2)Vpeak. Calculate the rms voltage for a sine wave with a peak-to-peak voltage of 1V.

2. Relevant equations
Vpeak-to-peak=2Vpeak

3. The attempt at a solution
This may be a really easy question with an answer of (√2)/4 but i wasn't sure if you could use the equation Vpeak-to-peak=2Vpeak with an offset in the sine wave.

2. Sep 25, 2015

### Staff: Mentor

Hi Ardec, Welcome to Physics Forums.

Your answer will depend upon what you mean by an "offset". Usually an offset means that there is a DC component added to the signal, so for example a sinewave riding on a DC value. This has the effect of shifting the sinewave up or down from the 0V level. But taking the problem as stated you simply have a sinewave with a peak voltage of 1/2 V, no offset. So can you explain what you mean by offset?

3. Sep 25, 2015

### Ardec

I miss read the question and correct myself the second after i posted this, there is no offset, and i didn't see a way to delete the thread. Thanks anyways for the answer