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**[SOLVED] Average Potential Difference**

## Homework Statement

The voltage across the terminals of an ac power supply varies with time according to V=V_0\cos(\omega t). The voltage amplitude is V_0 = 46.0 V

From the prior question, I already figured out that the root-mean-square potential difference is 32.5. V

**Question**What is the average potential difference V_{{\rm a}{\rm v}} between the two terminals of the power supply?

## Homework Equations

[tex]V_{rms}=V/\sqrt{2}[/tex]

[tex]V_{rms}=Vcos(\omega*t+\varphi)[/tex]

## The Attempt at a Solution

At first I thought that the average and the rms was the same thing, but now I can't figure it out. Does it involve finding current?