This video provides a graphical explanation of what RMS voltage is and why it ends up being basically the peak voltage divided by the square root of 2. The video uses some DESMOS plots to show how a sinusoidal voltage corresponds to power and energy, how that energy compares to the energy generated from a DC voltage source, and backs up to finding a comparable equivalent voltage, or RMS voltage.
![](https://s2.save4k.ru/pic/92vg6EJr3Bw/mqdefault.jpg)