As the drift velocity concept made perfect sense and also created null results where one would think effects might have been seen. And since it also can be confirmed based on homopolar generators and other experiments I decided to go further with it.
Could it impact time varying induction? Could a coil made of one thin and one thick strand, wound together and connected so as to produce zero net magnetic field still create a net induction due to the different drift velocities? I realized it was plausible, but I lacked the skill to do a decent analysis and I am unsure if anyone could, so I tried it, I got an extremely thin magnet wire (it was salvaged from the stator of a shaded pole fan motor from a microwave oven) and a very thick multi strand wire that can take serious amps, I connected the ends of each together and then wound this bucking bifilar coil on a cardboard tube, perhaps 30 turns. I then connected the thin and thick wires to my signal generator, and attached a handy air core coil I had lying around to my oscilloscope. Sure enough I got a signal! I thought it could just be electrostatic, but if I rotate the coil 90 degrees the transformer action disappears! Even if and capacitive coupling is enhanced. So it isn't capacitive, it is actual inductive coupling from a non-inductive coil to an inductive coil! I thought that maybe the input waveform was passing through one wire and being reflected at the transition, however the signal input is connected to the thin and the ground is connected to the thick wire which makes a reflection less likely, furthermore I lowered the input frequency down to 1.5khz and it still worked! Therefore at this point I am reasonably sure that both wires are receiving approximately equal current. The only thing left to test really is what the level of induction compares to if a simple coil was to replace this one, if it turns out that at least 5 or 10 turns or more are required to match the inductive abilities of this coil then that would in my mind further indicate that the rectification is due to different drift velocities! This experiment has now taken longer to write about than assemble and perform! I encourage others who have appropriate equipment to give this one a shot. There is not guarantee but this could have an OU implication as this coil appears to create an inductive field, but would not receive induction, or would it? John
