In single phase series circuits, should the current always be drawn along the x axis and the voltage then drawn with respect to it? E.g. Should Vr be drawn in line with I, VL leading by 90 degrees (pointing upwards) and Vc lagging by 90 (Pointing down)? The reason I ask is because ive seen some diagrams for a purely capacitive circuit where the voltage is along the x axis and the current is pointing upwards? but I always thought you drew the diagrams with the common factor on the horizontal?