Two infinite wires are located parallel to the y-axis. One wire has uniform charge density +λ and is located at x = +xo. The other wire has uniform charge density –λ and is located at x = –xo. Determine the electric field and the electric potential at every point in the xy-plane.

Two charged particles, q1 and q2, are located on the x-axis, with q1 at the origin and q2 initially at x1 = 12.2 mm. in this configuration, q1 exerts a repulsive force of 2.62 µn on q2. particle q2 is then moved to x2 = 18.0 mm. what is the force (magnitude and direction) that q2 exerts on q1 at this new location? (give the magnitude in µn.)