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February 22, 2026, 01:59:28 am
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Author Topic: RMS or p-p  (Read 587 times)  Share 

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TyErd

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RMS or p-p
« on: May 12, 2010, 03:50:27 pm »
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How do you know when to convert from RMS to peak to peak or from peak to peak to RMS. What situations do you have to use only RMS or p-p?
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Chavi

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Re: RMS or p-p
« Reply #1 on: May 13, 2010, 10:23:57 pm »
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An AC voltage with a sinusoidal curve will have an "average" voltage that is equivalent to a corresponding DC voltage.
To find this DC voltage divide the Peak voltage (The amplitude of the curve) by sqrt(2), or if you are given the peak to peak voltage, divide by 2*sqrt(2).

Converting AC to DC by the RMS (Root mean square) is mostly for simplicity, as the input voltage is normally AC and always varies - so mathematically, you can't model any of the circuits on Ohms Law with a changing voltage.

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