Question

Describe why any surplus charge placed on an isolated conducting object goes to its surface.

answer quickly please.

Answer 1

Any surplus charge placed on an isolated conducting object goes to its surface. Because no surplus charge remains in the body of conducting an object when it reached electrostatic equilibrium. Hence, the object placed arranges itself at the surface of the object.

If the electric field has a component parallel to the surface, free electrons on the surface would move but in equilibrium condition, the electric field is always perpendicular to the surface of a conductor.

This can be explained with the help of Faraday's ice pale experiment. This experiment shows that an electric charge enclosed inside a conducting shell induces an equal charge on the shell and that in an electrically conducting body, the charge resides entirely on the surface.