while being used to using LaTeX for several years now, I am fairly new to using CircuitTikZ. I was wondering if it is possible to change the wire size of only one (/some) wire(s) in a circuit like in the following example:
My MWE for drawing the circuit would be
\documentclass[10pt, a4paper]{article}
\usepackage[siunitx]{circuitikz}
\begin{document}
\begin{circuitikz}[european]
\draw (0,0) to[sinusoidal voltage source,label=$U$] (0,3) to[short, -*] (2,3)
to[lamp, l=$G$] (2,0) to[short, *-] (0,0);
\draw (2,3) -- (4,3) to[short, l=$R$] (4,0)-- (2,0);
\end{circuitikz}
\end{document}
And, I hope this is allowed to do here, I have a second question regarding the symbol of the voltage source: Does anyone know if there is a voltage source symbol consisting of the to empty circles like in the image above?
Kind regards and thank you for your help
Adrian