Question: 155/300 New Previous Year Solved Papers - Physic... A dielectric sphere of radius R has constant polarization P-P,2 so that the field inside the sphere is E-2. Then, which of (are) correct ? The bound surface charge density is P, cos 6. (A) (B) The electric field at a distancer on the z-axis varies as for r >>R. (C) PR The electric potential at a distance 2R on the z-axis is 12 (D) The electric field outside is equivalent to that of a dipole at the origin.