ABSTRACT
Image charges are always located outside the region where the field is to be determined. The method of replacing the equipotential conducting surfaces by appropriate image charges in place of direct solution of Poisson’s or Laplace’s equations is called the method of images. There are many electric field problems involving one or more types of charges in the presence of conducting surfaces with specific boundary conditions, which are difficult to satisfy, if the governing field equation such as Poisson’s or Laplace’s equations is to be solved directly. Image of a charge is not necessarily to be taken with respect to infinitely long plane only. It can also be taken with respect to curved surfaces. Electric field due to two parallel cylindrical transmission line conductors is the same as the field due to two infinitely long parallel cylinders.
