[quote:e7ec05feba="nv"](quoted from post at 19:41:41 01/16/10) The actual peak to peak voltage of the household power is nowhere close to 120 volts if you would look at it with an oscilloscope.
Rather, it is 1.414 times the 120 volts it is typically called.
AGAIN INCORRECT. The "actual peak to peak voltage" is TWICE that amount. 1.414 gives you the PEAK, or the amount of 1/2 cycle
You are correct on the rest. The entire reason for using the RMS figure is so that we can relate to the DC equivalent voltage for figuring power. That is to say, if you have 12V AC RMS versus a battery which is 12V DC, they will produce the same amount of power.
If on the other hand you had an AC voltage that was 12V peak---or 24V peak-to peak, the DC equivalent of that would be 12V X .707 = 8.484.
This post was edited by 440roadrunner at 19:53:05 01/16/10.
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