Just to make things even more confusing. see
"Trouble with Maxwell's Electromagnetic Theory: Can Fields Induce Other Fields in Vacuum?" http://vixra.org/pdf/1206.0083v4.pdf Excerpt below. -Mark ------------------------- "In this work I will argue that the idea of electric and magnetic fields inducing each other without the mediation of electrical charges is false because it is not based on experimental evidence. Pure electric fields, varying or not, are not known to produce pure magnetic fields in regions of space where electrical charges do not exist. Neither are pure magnetic fields known to produce, in regions of space where electrical charges do not exist, pure electric fields. It is only through the mediation of electric charges and currents that these phenomena can happen. I will take excerpts from the works (mainly textbooks) of authors who support the present day theory and I will point out where their argument fails." "What produces radio waves is known - rapidly changing electric currents in a conductor. But what is not known with certainty is how exactly radio waves are generated from these changing electric currents, how the waves detach themselves from the antenna and what radio waves really are when traveling through space. These, I contend, are problems still open for argument and will be discussed here." ------------------------- From: John Berry [mailto:[email protected]] Sent: Thursday, October 04, 2012 4:13 PM To: [email protected] Subject: [Vo]:Relativistic magnetic field I was pondering something and wonder if anyone here has any insight on the subject. In a wire coil, an electric current consists of a slow movement of electrons, the electric field from these charges though not detectable due to the presence of the electric field from the protons, never the less fills space both near and very very far from the wire. But owing to the (slow) movement of the electrons through the wire a Lorentz contraction takes place which changing the strength and shape of the electric field, it is now no longer neatly countered by the static proton field and what we term a magnetic field is born. That was the long way of saying that the electron drift creates a magnetic field due to relativistic effects, this is accepted conventional physics. Now let's say we have a circuit that consists on a battery in series with 2 inductors also in series, one is composed of very fat wire and the other is composed of extremely thin wire, possibly a different metal and possibly not a metal but something with a much higher electron drift velocity, the ideal of course would be some kind of vacuum tube where the electron velocity could near the speed of light. Now because these 2 inductors (well, coils) are in series the same current must flow through each, which means that the same number of electrons must flow through each of them. Now magnetic fields are meant to be caused by Ampere Turns, both of these inductors would have the same amps and could be given the same number of turns, so both should create equal magnetic fields. This is curious for several reasons, first off the degree of pancaking (the relativistic cause of the magnetic field) is very different and it seems unlikely that this very real difference would lead to no notable difference in some cases. Also while the coil with the high drift speed electrons would at any time have fewer electrons making it's field I find it a little odd that it would not have a more powerful magnetic field. The reason is that when we double the velocity of a mass we have 4 times the energy, so if we have half the number of electrons travelling at twice the speed (to create the same number of electrons past a point every second, the same amps) we have still doubled the inertial energy tied up in moving those electrons .vs the slower moving coil. (yes, electrons have very little mass) If there is a difference, could this explain various anomalies? I heard once that a coil of one metal somehow created a stronger field than the same current through the same number of turns through a copper coil, though I forget the metal it would have had a higher drift velocity. I also recall someone I think on Vo long long ago saying that they could not detect the expected magnetic field around a long flouro bulb compared to the wiring leading up to it. There are of course many possibilities of this turning up in Tesla coils (HV and many thin turns) and various other systems that have had reports of unusual effects. I would assume that Ampere and the others who established this field, established it from results primarily with copper coils of regular gauge under mostly sustainable currents. How much work has been done on magnetic fields from high drift speed currents? Of course a permanent magnet (or electromagnet with a steel core) creates magnetic fields from various different high speed electron and proton movements and spins so I accept that the results of a high speed magnetic field are not likely to be very unusual. John
