An electric dipole consists of two charges of equal magnitude and opposite sign separated by a distance 2a, as shown in Figure 25.14. The dipole is along the x axis and is centered at the origin.
(A) Calculate the electric potential at point P.
(B) Calculate V and E_{x} at a point far from the dipole.
(C) Calculate V and E_{x} if point P is located anywhere between the two charges.