A uniform electric field of magnitude 4.1 ✕ 10^5 N/C points in the positive x-direction. Find the change in electric potential energy of a +5.3 µC charge as it moves from the origin to each of the points given below.
(a) (0, 6.9 m)
(b) (6.9 m, 0)
(c) (6.9 m, 6.9 m)
I'm confused by the phrase electric potential energy. I was thinking I should use V= k|q|/r^2 but was then confused. Electric potential is V=kq/r so should I maybe just do that for an initial and final on each? Some research made it sound like I would use ( ∆V = -E*∆s ). Can someone help me as to which direction I should go?