# Electric field energy

1. Apr 26, 2005

### jmb741

1a) The hydrogen atom has a single electron in a fixed orbit around the proton with a radius of (5.29 E-11 m). Find the total electric field energy U(E) for the electron and proton assumming that each one has a radius of (1.00E-15 m).

1b) Included the additional contribution to the electrical potential energy U'(E) if we consider the charge within the proton as a uniform charge distribution.

2. Apr 26, 2005

### OlderDan

Electric field energy density is

$$u=e_0E^2/2$$

The numbers give you the separation of the charges, and I assume the radii are to be used to treat the charge as distributed over the surface in part a) and then uniformly distributed for the proton in part b)