documentclass{article}
usepackage{circuitikz}
usepackage{showframe}

begin{document}

begin{circuitikz}
draw
   (8,2) to [american voltage source, v_<=$omega_RL_qi_q$] (8,4);

draw[lightgray,dotted] %or dashed
  (8,0) to [american voltage source, v_<=$omega_Rpsi$,color=lightgray] (8,2);
end{circuitikz}

end{document}