Which electrode on a vacuum tube is operated with the highest positive voltage?

In a vacuum tube, the plate (also known as the anode) is the electrode operated at the highest positive voltage relative to the cathode. This strong positive potential is necessary to attract the negatively charged electrons that are boiled off the heated cathode, creating the main current flow through the tube. Conversely, the control grid is typically operated with a negative voltage to regulate the electron flow, while the cathode is the electron source and sits at a low potential or ground. The 'collector' is a distractor, as it is a term specifically used for bipolar junction transistors, not vacuum tubes.