일반물리학 2 — Electric Potential: Problem 26

26 When an electron moves from A to B along an electric field line in Fig. 24-32, the electric field does \( 4.78 \times 10^{-19} \text{ J} \) of work on it. What are the electric potential differences (a) \( V_B - V_A \), (b) \( V_C - V_A \), and (c) \( V_C - V_B \)?