Starting from Coulomb's Law, relating the force between two point charges to the magnitude of the charges and the distance between them, develop expression for the electric field density, D and electric field intensity, E, at a distance of r meter from a charge of magnitude +q1 coulomb. [20%]
then show that the absolute potential at a distance of r meter from a point charge of +q1 coulomb, in air is given by V = q1 / (4pi x epsilon x r) . [30%]
then show that the absolute potential at a distance of r meter from a point charge of +q1 coulomb, in air is given by V = q1 / (4pi x epsilon x r) . [30%]