Learn more physics!
vrms=0.707 vp. from where we get the value 0.707???
- john (age 23)
For a nice sinusoidal wave, say Vp
sin(ωt), the maximum voltage is Vp
. The average square of sin(ωt) is just 1/2. (sin2
=1, and each has the same average.) So the average of the voltage squared is just Vp
/sqrt(2). 1/sqrt(2) =0.707.
This only works for sine waves, not say triangle or square waves.
(published on 07/29/2009)
Follow-up on this answer.