1. The problem statement, all variables and given/known data Determine the work required to move the plates of an ideal parallel plate capacitor from a seperation distance of D to an integer multiple of D, (assume only one moves for simplicity). The each plate has an area A. 2. Relevant equations F = q^2 /( 2 e_0 A) field strength between the plates [tex]\Delta[/tex] V = U/q [tex]\Delta[/tex]U = -W [tex]\Delta[/tex]V= Qd/e_0 A 3. The attempt at a solution moving the terms above around I came up with U = Qdq/e_0A I know I need an integral here, probably evaluated between D and multiple of D(its a general solution thats needed) Am I on the right track?