Question: what is the difference between average and root mean square?
Answer: That's what the RMS refers to: Root Mean Square: take the square root of the average (mean) of the squared voltage. ... The RMS value is √2/2, or about 0.71, the average value is 2/π, or about 0.64, a difference of 10 %. RMS gives you the equivalent DC voltage for the same power.