Chapter 22, Problem 76P

In Fig. 22-67, an electric dipole swings from an initial orientation i (θ_i= 20.0°) to a final orientation f(θ_f = 20.0°) in a uniform external electric field $\stackrel{\to }{E}$. The electric dipole moment is 1.60 × 10^–27 C · m; the field magnitude is 3.00 × 10⁶ N/C. What is the change in the dipole's potential energy?

Figure 22-67

Problem 76.