1. The problem statement, all variables and given/known data Explain why the gas becomes conducting only when the electric field in the tube reaches certain value? 2) why does fields does from higher potential to lower potential? 2. Relevant equations F=QE 3. The attempt at a solution If we increase the E then the Force will also increase so I think the gas needs certain amount of force for it to move to other end. I am not sure If I am right.