| An
email from a year ago.
[?]Heaviside failed to notice that[?], under his statement
"We reverse this"; the field causes the current not the
reverse, and under his "slab of energy current", the battery
yearns to deliver, not electric charge/current into the wires, but
electromagnetic field into the space/dielectric between the guiding
conductors. The battery is more accurately drawn in Figures 33 and
34 rather than in Figures 31 and 32, http://www.ivorcatt.co.uk/2_4.htm
If the two conductors are properly in place, the electromagnetic
field ExH travels forward, guided by the wires, at the speed of
light. If the circuit is terminated by a capacitor, it arrives at
the side of the capacitor, not at the middle ot its two plates,
as our diagrams indicate. In the same way as Figures 33 and 34 correct
our conventional drawing of a battery (Figures 31 and 32) and make
them more like physical reality, Figures 33 and 34, so the physical
reality of our capacitors is not as we draw capacitors. Rather,
the input wires enter one end of the capacitor, guiding the incident
TEM Wave ExH directly into the space/dielectric between the capacitor
plates.
Like Heaviside, Roentgen had no idea of all the above, and it would
be far too much work to unscramble his experiments, based by him
on the wrong premise, and work out what he really found. Of course,
he did not find a magnetic field circumnavigating the capacitor
between the two plates, (as per Ampere's Law,) because the advancing
TEM ExH wave, has a magnetic field in another direction, at right
angles to the direction of the incident TEM Wave. Most of the incident
wave is reflected at the massive change of characteristic impedance
in the change from two wires (say 100 ohms) to the space between
the capacitor plates (say 0.01 ohms). After this change, a small
amount of the incident energy current proceeds in the space between
capacitor plates, reflected at the far end, reflected at the near
end to add to the further incident energy current, and so on. See
Figure 3 of http://www.ivorcatt.org/icrwiworld78dec2.htm . Note
that the exponential is a wrong waveform for the charging of a capacitor
by battery through resistor, which is really a series of steps which
only approximate to an exponential.
If you mess around with theorists who theorised before key insights
were gained, then even if you feel you are finding useful truths,
they are really like those of Nostradamus, or monkeys typing for
a long period. You cannot usefully go back to before Heaviside said;
"We reverse this" - the field causes the current and not
the reverse. Similarly, you cannot get useful information from those
who predate 1978, http://www.ivorcatt.org/icrwiworld78dec2.htm ,
when it was first pointed out that the fact that incoming electric
current/charge had first to spread out across the capacitor plates
before yearning to jump across to the other plate. http://www.ivorcatt.com/411.htm
Ivor
----- Original Message -----
From: Monitek@aol.com
To: icatt@btinternet.com ; kc3mx@yahoo.com ; knalty@io.com
Cc: epola@tiscali.co.uk ; imontgomery@atlasmeasurement.com.au ;
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; ernest@cooleys.net ; lukas.nemec@czi.cz ; krystof.nemec@czi.cz
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; temiles@cox.net ; andrewpost@gmail.com ; raetowest@hotmail.com
Sent: Friday, October 24, 2008 7:22 AM
Subject: Re: Displacement Current
Dear All,
Roentgen has measured the displacement current via the associated
magnetic field. Of course the displacement current only appears
when the charge is changing, that is the only time the magnetic
field appears ie when the displaced charges move, no movement of
charges no current flowing no magnetic field.
Today I found the following link which I have not yet had time to
read:
http://bjr.birjournals.org/cgi/reprint/70/836/809.pdf
I look forward to your comments.
Regards,
Arden
In a message dated 21/10/2008 22:11:15 GMT Daylight Time, icatt@btinternet.com
writes:
Quoted in http://www.electromagnetism.demon.co.uk/z014.htm
Oliver Heaviside, Electromagnetic Theory, vol. 1, 1891, sect. 30,
p29; "As the dielectric is supposed to be a non-conductor,
the current is [dD/dt], and only exists when the charge is varying.
.... It was probably by a consideration of conduction in a leaky
condenser that Maxwell was led to his inimitable theory of the dielectric,
by which he boldly cut the Gordian knot of electromagnetic theory."
Ivor
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