What is the formula used to find the peak voltage of 100 volts effective?

Answer 1

if your voltage signal is sinusoidal, then you take your Vrms (effective) voltage and multiply by 1.414 (or more specifically, the square root of 2) to get the peak voltage, or multiply by 2root2 (2 times sqrt(2)) to get the peak to peak voltage. So for example, in your house, you may measure 120 Vrms at the outlet, but the peak voltage is about 170V

If you really want to be a nerd and get technical, you need to be familiar with basic Integral calculus to conduct your calculations from scratch, so to speak. For everyday use, just use the square root 2 method.

Answer 2

100 volts effective is the rms- root mean squared (0.707) of the total peak voltage. to find the peak of an rms i think you times it by 1.414? its the inverse of 0.707 anyway, long time since i was at college