Re: Displacement current

• To: tesla-at-pupman-dot-com
• Subject: Re: Displacement current
• From: "Malcolm Watts" <MALCOLM-at-directorate.wnp.ac.nz> (by way of Terry Fritz <twf-at-verinet-dot-com>)
• Date: Wed, 03 Mar 1999 06:24:45 -0700
• Approved: twf-at-verinet-dot-com

Hi DC,

> Original Poster: "Dr. Resonance" <Dr.Resonance-at-next-wave-dot-net> 
 
<snip>
> 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
> difficult.

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.

Thanks,
Malcolm
<snip>

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