I have been trying to figure out what the equation is for this problem: A glass tube filled with gas has electrodes at each end. When a sufficiently high potential difference is applied between the two electrodes the gas ionizes; electrons move towards the positive electrod, and the positive ions move toward the negative electrode. a) What is the current in a hydrogen discharge if, in each second, 3.6 * 10 ^18 electrons and 1.15 * 10 ^18 protons move in the oppisite directions through a cross section of the tube? I am not sure what the equation(s) is to solve this problem. I have searched my book to see if I can find something similar to this but have not been able to find anything that discusses this topic.