rattus, for us dummies (like me), will you explain why? It seems like 0-4V square wave would be 2V and 0-4V sine wave would be 2.8V.Originally posted by rattus:
Sam,
If it is a 0 to 4V square wave, the RMS value is 2.8V.
If it is a -2 to 2 square wave, the RMS value is 2V.
Stiff,rattus, for us dummies (like me), will you explain why? It seems like 0-4V square wave would be 2V and 0-4V sine wave would be 2.8V.
RMS applies to anything. You can square any function you like, take an average value, then extract the square root. I can plot the Dow Industrial Average versus time over the course of a year, then find the RMS value of that curve. It just wouldn't be useful information.Originally posted by rattus:RMS only applies to voltage and current.
RMS power would give you a way to compare RMS power between different devices- assuming identical source.Yes, you can waste time computing meaningless RMS values, but since they are useless they do not apply to anything--RMS power for example.
Rick, how do you define RMS power? My point is that term is undefined. Vrms x Irms x PF yields average power.RMS power would give you a way to compare RMS power between different devices- assuming identical source.
Root-mean-square values for statistics are not any more useless or meaningless than terms like "average" or "mean" or "meridian". It is another term used to describe a set of points. See this link for example (and scroll down to Root-mean-square):Originally posted by rattus:
C. B.,
Yes, you can waste time computing meaningless RMS values, but since they are useless they do not apply to anything--RMS power for example.
Root mean squared pertains to the maxwell distribution speeds at a certain temperature of a certain molecule
I don't have a clue what that last one means But pick any topic, and I bet you can find a use for RMS values.In the
lowermost stratosphere root-mean-squared scatter of
the observed differences increases dramatically (above
100 hPa with HALOE and POAM, and above 50 hPa
with SAGE II).
You never know Charlie, it could be the newest buy/sell trigger to trading stocks.Originally posted by charlie b:
I can plot the Dow Industrial Average versus time over the course of a year, then find the RMS value of that curve. It just wouldn't be useful information.