A particle of charge +e is initially at coordinate z = 20 nm on the dipole axis through an electric dipole, on the positive side of the dipole. (The origin of z is at the dipole center.) The particle is then moved along a circular path around the dipole center until it is at coordinate z = -20 nm. Figure 24-36b gives the work Wa done by the force moving the particle versus the angle? that locates the particle. The scale of the vertical axis is set by Was = 2.0 × 10-30 J. What is the magnitude of the dipole moment?