Consider two parallel wires 3 [m] apart. They are oppositely charged. If the electric field strength halfway between them is E = 1.5 104 [V/m], how much excess positive charge rests on a 1 [km] stretch of the positive wire. 2 - E = 1.5 x 10 [V/m] 3 [m] Hint: First, find the charge density. Then, the charge on a certain length of a wire.