In such a simple circuit
\documentclass[12pt]{article}
\usepackage[siunitx]{circuitikz}
\usepackage{tikz}
\begin{document}
Resistance:
\begin{circuitikz}
\draw (0,0) to [R=$R$,*-*,v=$V_1 - V_2$] (2,0);
\end{circuitikz}
\end{document}
I would like to increase the distance between the label (so, the arrow and the $V_1 - V_2$ expression) and the resistor itself.
1) Hoping that it is possible, how can I do it?
2) Again, if possible, how can the arrow be bent a little bit more? If I change the scale to, say, 2.0, the arrow line appears almost straight.