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In the Aether Physics Model, eddy current is a unit of measurement equal to the unit of magnetic flux squared1. According to the Aether Physics Model, this is equivalent to angular momentum times resistance: Eddy current is also equal to potential times 4p times inductance... According to Dr. James B. Calvert2 in a online web page about Eddy Currents, it has been reasoned that eddy currents are complete path electrical currents that flow through a conductor. "A magnet produces a pure magnetic field in its rest frame. Anything moving with respect to the magnet sees an electric field in addition to the magnetic field, that is roughly proportional to the relative velocity. An electron free to move, as in copper, will be set into motion by the electric field it sees. ... This current is called the eddy current, since it flows in closed loops in a conducting plate like eddying water." He goes on to describe the physical eddy current within a copper tube, down which a neodymium-iron-boron (NIB) magnet is dropped;
In an effort to test this theory I dropped a NIB magnet down a copper tube. The magnet is 1" in diameter and nearly ¼" thick.
As the magnet dropped, it dropped at a much slower velocity than it would in free space, as Dr. Calvert explained it would.
During the descent the plane of the magnet was near perfect perpendicular to the length of the tube throughout its travel. According to Dr. Calvert, the magnetic field of the magnet moving through the copper tube makes the copper tube see an electric current. This electric current would flow along one direction near the top of the magnet and in the opposite direction near the bottom of the magnet. To test this theory I had my son take a section of copper pipe and cut it along its length, thus preventing any current flow around the periphery of the tube.
Conducting the experiment, the magnet was dropped into this slit tube. If the eddy currents were propagating through the periphery of the tube, they would not form in this experiment and I expected the magnet would drop straight through.
But as can be seen in the photos above, the magnet still dropped through at a slow rate. The rate was slightly faster than the rate of drop through the un-slit tube. In addition, the magnet did not fall perpendicular to the length of the tube. Instead, the magnet fell with a noticeable tilt toward the slit. The interpretation of this experiment is that the eddy current is a result of the angular momentum of the atoms within the magnetic field times the resistance of the atoms within the magnetic field. Along the slit, there are no atoms and thus no eddy currents, and so the magnet tends to fall faster along this area. But the angular momentum in the atoms along the path of the magnetic field still contribute to eddy currents and thus the other parts of the magnet tend to fall slower. This results in the tilt of the magnet as it falls. In a preliminary test with a cheap handheld ohmmeter, I connected to each edge of the slit in order to test for resistance around the periphery as the magnet fell through the tube. When the magnet was stationary and at the top of the tube, the total resistance was .3 Ohm. As the magnet fell through the tube and reached the points where the voltmeter probes were attached, the total resistance increased to .4 Ohm to .8 Ohm, depending on the size of the magnet. As the magnet continued its drop passed the probe points, the resistance dropped to .2 Ohm before returning to .3 Ohm. I have since purchased an HP 34970A data acquisition switch with a built in digital multimeter. Two terminals were soldered mid-length, one on each side of the slit as in Figure 6. Figure 6. Slit tube with leads attached mid-length.The magnet was dropped down the tube while the resistance was measured at the terminals. Several tests were run and each test produced the same graph, as shown below. Figure 1. Resistance of copper pipe over time
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Last updated on Friday, June 13, 2008 03:58:51 PM