The electric field strength of the very long charged wire the linear charge density of the wire and as well as the force on the proton from that wire. Therefore, when the charge density is doubled, the proton would experience the same force magnitude if the distance between it and the wire is .

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.)