A pair of unlike charges equal in magnitude and separated by a small distance is known as a dipole. Such a pair is situated on the x axis at equal distances from the origin as shown in the figure below. The electric field at points to the right of the dipole that are very far -1, where d is the distance between the two charges, k is Coulomb's constant, and q is the magnitude of the charges of the dipole. compared to the distance between the two charges is given by E: 2kqd ---- +9 -9 A B x (a) What is the potential difference VA - VB, if q = 4.30 nC, d = 2.50 mm, XA How is the potential defined in terms of a varying electric field? V = 15.0 cm, and = 22.8 cm? (b) If an electron moves from B to A, what is the change in potential energy of the electron-dipole system? J Additional Materials Reading Submit Answer