Halliday, Resnick & Walker — Electric Potential: Problem 62

62 Consider a particle with charge \( q = 3.0 \text{ nC} \), point A at distance \( d_1 = 2.0 \text{ m} \) from \( q \), and point B at distance \( d_2 = 1.0 \text{ m} \). (a) If A and B are diametrically opposite each other, as in Fig. 24-48a, what is the electric potential difference \( V_A - V_B \)? (b) What is that electric potential difference if A and B are located as in Fig. 24-48b?