what happens to the voltage when it goes thru this circut

I see what you mean, however I am new to this so easy to get stuck

actually I don't know exactly what happens to the voltage when it goes thru this circut, but I am assuming the the current thru

$\displaystyle 8\Omega = \frac{200v}{8\Omega} = 25A$

but then we don't get the 40V from this.

so something has to be happening as the circut goes into the series and parallel configuration. yes it appears that we concerned with the $\displaystyle R_{ae}$