With examples of the dot-charge pair and the dot-charge-conductor-ball system,we introduce how to simulate the potential distributing on the microcomputer by using the MATHEMATICA.

The Electric potential of a conductor ball in the electric current field of a point source is derived.

By using the variable decomposition method under double-ball coordinate system,the passage discusses the computation of interactive force between two charged conductive balls,and obtains its strict solution.

Interior solution of static charged sphere in higher-dimensional space-time;

A exact interior solution of Einstein-Maxwell field equations in static charged sphere symmetric higher-dimensional space-time;