Chapter 23, Problem 28P

(II) Point a is 26 cm north of a –3.8 μC point charge, and point b is 36 cm west of the charge (Fig. 23–27). Determine (a) V_b – V_a and (b) ${\stackrel{\to }{E}}_{\text{b}}-{\stackrel{\to }{E}}_{\text{a}}$ (magnitude and direction).