Register to reply

Rms voltage

by lavster
Tags: voltage
Share this thread:
Nov7-12, 03:47 AM
P: 216
If I have a wave that looks pretty much sinusoidal but the peak positive amplitide is greater than the peak negative applitude how do I calcualte the rms vlaue - is it still the peak positive amplitude divided by root 2?
Thanks :)
Phys.Org News Partner Physics news on
UCI team is first to capture motion of single molecule in real time
And so they beat on, flagella against the cantilever
Tandem microwave destroys hazmat, disinfects
Nov7-12, 03:53 AM
P: 6
I would take an average of the amplitudes. but how large is the difference? If you take an average it would be equal to move the refrence point to where the amplitudes is equal for both the negative and the positive. and then it is a perfect sinusoid.
Philip Wood
Nov7-12, 07:28 AM
PF Gold
P: 963
Interesting question!

Unless I've miscalculated, the rms voltage is given by [itex]\sqrt{V_1^2 + \frac{V_0^2}{2}}[/itex] in which V1 is the constant offset voltage and V0 is the amplitude of the sinusoidal voltage.

Calculations can be revealed if requested!

Register to reply

Related Discussions
Finding resistor's voltage with current and voltage sources present Introductory Physics Homework 5
Figuring out voltage across resistor and current in loop given initial voltage input Engineering, Comp Sci, & Technology Homework 2
Interpret Voltage-time graphs to relate the ouput voltage of a piezoelectric crystal Electrical Engineering 7
Node voltage Analysis with voltage controlled voltage source Engineering, Comp Sci, & Technology Homework 4