Walker, Halliday & Resnick — Electric Potential: Problem 64

64 Two charged particles are shown in Fig. 24-49a. Particle 1, with charge \( q_1 \), is fixed in place at distance \( d \). Particle 2, with charge \( q_2 \), can be moved along the x axis. Figure 24-49b gives the net electric potential \( V \) at the origin due to the two particles as a function of the x coordinate of particle 2. The scale of the x axis is set by \( x_s = 16.0 \text{ cm} \). The plot has an asymptote of \( V = 5.92 \times 10^{-7} \text{ V} \) as \( x \rightarrow \infty \). What is \( q_2 \) in terms of \( e \)?