Re:Electrostatics (was Charge distribution on a Toroid (was spheres vs toroids)0

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Robert Jones" <alwynj48-at-earthlink-dot-net> 

The charge thread got me thinking about electrostatics. I realized I was
very rusty on the subject. I tried to recap the fundamentals but found a
problem with my thinking.

Can someone explain were I have gone wrong. It may help others too.

1. Charge is the fundamental quantity and can be positive and negative

2. Like charges repel and opposite charges attract with a force proportional
to the product of the charges and inversely proportional to square of the
distance.

3. Voltage is a measure of the energy required to move a charge from one
location to an other i.e. if there are charges there already the moving
charge will experience a force, force x distance is energy.

4. Lines of flux are the direction of the energy required with respect to
space for 3.

5. The energy required to move a charge is a property of the material
surrounding the location that the charge will reside at. This is usually
referred to as energy stored in the surrounding medium as electrostatic
strain i.e. energy in the field. The permittivity thing.

The above seems to be right. However due to 2 the force is only a function
of the charge on an object where as 3 and 5 suggest it's also a function of
the capacitance???

Were have I gone wrong?  Yes I know the above are not rigorous definitions
but I think they will do.

Bob