6. You have measured an electrostatic potential distribution in the free space given by V(r) = (1/r2 + 3coso/r + 6pcos0) [in V], where r and O represent spherical coordinates. p and p are cylindrical coordinates. (1) Find the electric field distribution E and the flux density D. (2) What is the charge distribution that would give rise to the measured potential?

6. You have measured an electrostatic potential distribution in the free space given by V(r) = (1/r2 + 3coso/r + 6pcos0) [in V], where r and O represent spherical coordinates. p and p are cylindrical coordinates. (1) Find the electric field distribution E and the flux density D. (2) What is the charge distribution that would give rise to the measured potential?