Good evening, Have you ever stirred a bucket of water with a wooden spoon? If you go around in a circle, and go fast enough, a funnel will form in the surface of the water. I have been able to make funnels so big, I could stick my hand in without getting wet. It's like a water tornado.
I was thinking: "This is what it must look like in the space around a wire carrying pulsed DC." If your electric current always flows in the same direction, never reversing direction, then the magnetic field around the wire will always spin in the same direction. It's like stirring water only clockwise, until the vortex forms. Alternating current would be like stirring the water CW, then CCW, every other stroke: the water would just splash around, and you would never get a funnel. If you have an iron ring around your wire, then with each pulse of current, you're magnetizing the iron in the same direction, over and over. You don't have to overcome hysteresis -- your hysteresis curve is always in the upper right-hand quadrant. Is there something analogous to hysteresis which is a property of the aether? I mean, if you take the iron ring away, and keep sending current pulses, does something start to happen in the space around the wire? P.S. Can you tell me a thing or two about vortices?
