This question is giving me some difficulty. Under normal atmospheric conditions, the potential in the atmosphere near the earth's surface rises 80 V for every metre of increased elevation. A) What direction will free electrons in the atmosphere move? B) Calculate the loss in electric potential energy of a free electron which moves vertically through 10 m in the atmosphere. For A) would the electrons move vertically since q1 and q2 are being moved further apart? I don't know how to get the answer in B.