일반물리학 2 — Electric Fields: Problem 42

42 In Fig. 22-40, particle 1 of charge \( q_1 = -4.00q \) and particle 2 of charge \( q_2 = +2.00q \) are fixed to an x axis. (a) As a multiple of distance L, at what coordinate on the axis is the net electric field of the particles zero? (b) Sketch the net electric field lines between and around the particles.