1. The problem statement, all variables and given/known data Large electric fields in cell membranes cause ions to move through the cell wall. The field strength in a typical membrane is 1.0x10^7 N/C. What is the magnitude of the force on a calcium ion with charge +e? 2. Relevant equations E = F/q > F = Eq 3. The attempt at a solution Well, I thought that +e = ~1, so F = 1.0x10^7(1) So, F would equal 1.0x10^7, but that is not correct. Can anyone help me?