by "Bas" <geenspam@[EMAIL PROTECTED]
>
May 11, 2008 at 11:42 AM
Thanks a lot!
"MathManiac" <math.maniac.hr@[EMAIL PROTECTED]
> wrote in message
news:e7b6a18e-e8a8-4823-9761-5969d6abc948@[EMAIL PROTECTED]
> Very easy...
>
> Vc = Vx(1-e^(-t/RC))
>
> divide by V
>
> Vc/V = 1-e^(-t/RC)
>
> put e^() left, Vc/V right
>
> e^(-t/RC) = 1- Vc/V
>
> natural logarithm (log with base e, somewhere ln)
>
> ln (e^(-t/RC)) = ln(1 - Vc/v)
>
> From ln x^n = n*ln x and ln(e) = 1 we have
>
> -t/RC = ln (1 - Vc/V)
>
> and it is trivialy to show
>
> t = - RC * ln (1 - Vc/V)
>
>
>
> I'll hope that I didn't make error.
> -----------------------------------------
> Summer in Croatia.
