5)
\begin{tikzpicture}
\draw (0,0) -- (0,2) -- (6,2) -- (6,0) -- cycle;
\draw (0,1) circle (0.2);
\draw (6,1) circle (0.2);
\node at (-0.5,1) {12v};
\node at (6.5,1) {6v};
\draw (1,1.75) -- (1,1.25);
\draw (1,1.75) -- (2,1.75);
\draw (2,1.75) -- (2,1.25);
\draw (2,1.75) -- (3,1.75);
\draw (3,1.75) -- (3,1.25);
\draw (3,1.75) -- (4,1.75);
\draw (4,1.75) -- (4,1.25);
\draw (4,1.75) -- (5,1.75);
\draw (5,1.75) -- (5,1.25);
\draw (5,1.75) -- (6,1.75);
\node at (2.5,1.9) {50\Omega};
\draw (2,1.25) -- (2,0.25);
\draw (2,0.25) -- (1,0.25);
\draw (1,0.25) -- (1,0);
\draw (4,1.25) -- (4,0.25);
\draw (4,0.25) -- (5,0.25);
\draw (5,0.25) -- (5,0);
\node at (1.5,1.5) {50\Omega};
\node at (4.5,1.5) {50\Omega};
\node at (1.5,0.5) {100\Omega};
\node at (4.5,0.5) {200\Omega};
\end{tikzpicture}
