 #1
greg_rack
Gold Member
 363
 79
 Homework Statement:

Determine the intensity and direction of the current passing through the resistor of ##4.00\Omega##
(Diagram below)
 Relevant Equations:

##I=\frac{V}{R}##
##\Delta\_{Vtot}=0##
So, I started by writing down conditions imposed by Kirchhoff's laws, coming up with a system of 3 equations with the 3 unknown currents:
$$
\left\{\begin{matrix}
9V8\Omega I_{8}+6V4\Omega I_{4}=0 \\
6V4\Omega I_{4}+3V2\Omega I_{2}=0\\
I_{2}+I_{8}=I_{4}
\end{matrix}\right.$$
But something's wrong.