Re: Displacement current
> Original Poster: "Dr. Resonance" <Dr.Resonance-at-next-wave-dot-net>
> The second problem is a vacuum has a very low dielectric constant. To
> properly conduct this type of experiment a very high dielectric constant
> material such as barium titanate would be used and microwaves would also be
> employed. It can and is daily measured in a vacuum but with microwaves not
> low frequency waves --- the magnetic field value is so low at low
> frequencies it is nearly impossible to measure -- at least extremely
Why is a high dielectric constant desirable/necessary? Does it have
something to do with the current density (i.e. small plate area for a
given value of C)?
I can well understand the consternation of Maxwell if the
current couldn't be found. Moving charge always has an inductive
component associated with it. This is the answer to the classic two
capacitor dilemma of conserved charge but apparently missing energy.