Need help with Problem 1 2. Relevant equations E = kq/r2 V = -W/q V = kq/r 3. The attempt at a solution 1a. dE = kdq/rRSUP]2[/SUP] dq = p ds dE = kpds/R2 Not sure if I am right up to this point and don't know how to proceed. 1b. I think the electric field would be zero since the enclosed charge cancels out. Not sure on this either. 1c. V = kq/r so V = kZe/a W = -kZ2e2/a 1d. Not sure how to approach Any help would be appreciated!