Re: Inertial-dampening systems

msadkins04_at_yahoo.com
Date: 02/07/05 

Date: 7 Feb 2005 14:19:11 -0800

Gregory L. Hansen wrote:
> In article <1107743305.741695.255450@c13g2000cwb.googlegroups.com>,
> <msadkins04@yahoo.com> wrote:

<snip>

> >
> >(2) Take your silly "one-turn secondary" comment literally, > >for a
moment; take that wire, disconnect it from the
> >transformer circuit, and suspend it in mid-air by some
> >well-insulated means, but well within the same distance
> >of the magnetic field generated by the primary. Now send
> >high-voltage *DC* through the primary; then quickly
> >increase that voltage to a much higher DC level. Does
> >the "varying magnetic field" generated by it cause gross
> >current to flow through the body of that disconnected
> >secondary wire?
>
> I've just done that. A spool of wire (I don't know how many > turns)
connected to a function generator (Stanford Research
> Systems DS345) with a 10 ohm resistor in series, and a
> scope (Tektronics 2445B) across the resistor to monitor the
> current. And a one turn secondary with a 10 ohm series
> resistor, and a second channel on the scope across that
> resistor. I put a square wave on the primary, and damned
> if the secondary didn't spike every time the primary changed
> state. I put a sawtooth wave on the primary, and found a
> square wave on the secondary with an amplitude that
> increases with the frequency of the sawtooth on the primary.

Of course you did. Do you know why? Because you created a completed
circuit consisting of: the first part of the wire, the resistor in
series with it, the lead of your scope coming off the far side of the
resistor, the scope innards, and the other scope lead connected to the
near side of the resistor. You created a grounded, completed circuit,
and lo and behold, the magnetic pulse induced an electric current. But
only through that circuit. There was no current flow through the rest
of that wire, of course. And if there had been no resistor and no
scope, but just a piece of wire, why on earth would you claim to think
that current would flow down its length? Electric current requires two
things: (1) a path; (2) an electromotive potential difference. A
straight length of isolated wire provides neither. A closed loop of
isolated wire provides neither. There is no current flow there.
(Another possibility is direct induction on your scope, but I tend to
discount that.)

A straight wire is not a circle and gross current cannot flow along the
conductor circularly. A closed loop of wire, though a circle, provides
no path because there is no potential difference. EMF at the "start of
the circle" (wherever you wish to define that) is the same as at the
end, because the end is also the start. It's a circle. Superconductor
ring currents are different, because there it is not externally applied
EMF which keeps the electrons going *once they have been accelerated*,
but rather their own momentum and the absence of electrical resistance.

<snip>

> >
> >(3) You can't have it both ways. If a magnetic field of
> >16 T, propagating, washing over a frog in an ambient
> >magnetic field of 0, is "quasi-stationary", then so is a
> >propagated change in that field from 16 T to 32 T. The
> > difference in both cases is 16T.
>
> Quasi-stationary (I suppose quasistatic is a more common
> term) means the field changes slowly enough in the region
> of interest that propagation effects can be ignored.
> That doesn't mean the magnetic field won't change in the
> region of interest. The field versus time will be
> determined by the current versus time in the magnet.
> But in the quasistatic approximation, if you change the
> current at point A, you don't worry about how long it
> takes that to affect the field at point B.

First, a field propagating at c does not cause changes slowly. A
faster influence cannot be postulated in contemporary physical models.
By influence, I don't mean the time it takes the machine to warm up, or
the time it takes to travel across the chamber, I mean the time it
takes to travel the length of the frog's body.

And you can't ignore it, because that change in magnetic field strength
is what causes magnetization. The subsequent, continuing, field of the
same strength merely maintains it, and does work if it moves the frog.
Consider how a cyclotron works. The magnets cannot impart additional
rotational energy to an electron whirling around in it: they can only
maintain its orbit.

In order to magnetize that frog, you have to increase atomic
spin-energy in each of its atoms. That's what that 2 amps of
non-dissipative atomic microcurrent represents (and by the way, these
are ubiquitous, not surface, currents, because every molecule in its
body is magnetized. This magnetization is negative relative to the
field, because M = kB and k is negative here. You can't increase the
spin energy of the atomic electrons directly by means of a magnetic
field; the magnetic field must induce an electric field to do that.
That occurs when the ambient magnetic field strength increases from 0
to 16 T as the field propagates over that frog when it is first
exposed. The continuing magnetic field maintains the magnetic
polarization that is necessary to keep those microcurrents stable,
instead of entropically decaying via spontaneous emission of radiation.
    .
Mark Adkins
msadkins04@yahoo.com

Relevant Pages

  • Re: FALWELL ROT IN HELL GRAPHIC
    ... If my memory serves me right, Aron Kay was one of the founders of the ... Youth International Party and that's a contribution to last ...
    (rec.music.gdead)
  • Re: You were right, Im a bittorrenting fool
    ... All of mine has been transferred to DVD. ... when the hard drives have failed. ... Lossless Legs) has apparently been shut down ... serious reasons than a mere server glitch unfortunately. ...
    (rec.music.gdead)
  • Re: FALWELL ROT IN HELL GRAPHIC
    ... only post screeds here and contributes nothing of any value IMO. ... If my memory serves me right, Aron Kay was one of the founders of the ...
    (rec.music.gdead)
  • Re: Talkin Ryan Adams Shower Cap Massacree
    ... Uhhh cause Jorma & Jack are talented 1st class musicians and Ryan Adams is a ...
    (rec.music.gdead)
  • Re: Inertial-dampening systems
    ... If, as Mr. Hansen suggests, the propagation of the field from 0 to 16 T ... No electrocution when it is first magnetized ... increased a second time after magnetization. ... take that wire, ...
    (sci.physics)
Loading