How about it's the most stressed point from the bending?
When you bend an iron bar, the inner diameter of the bend wants to get smaller and the outside diameter of the bend wants to stretch.
So this difference, occurring while bending, could have a lasting effect.
So the molecules on the outside are stretched, on the inside are compressed. Could this difference generate an electrical/magnetic field?
When you bend an iron bar, the inner diameter of the bend wants to get smaller and the outside diameter of the bend wants to stretch.
So this difference, occurring while bending, could have a lasting effect.
So the molecules on the outside are stretched, on the inside are compressed. Could this difference generate an electrical/magnetic field?
One way to test your theory is also to try and sandblast the steal too see if the effect goes away, you could also use an acid or strong base to eat away any oxide you have on the outside. KOH or NAOH (drainO) should do it.
@LaserSaber. I would take precautions with regard to making contact with your fingers and the meter probes. I observed that there was reasonably consistent contact being made in your video. As i'm certain you have observed the current or grounding effect our own bodies can create or generate which can easily produce voltage levels of the sort you are reading. I don't mean to be sceptical, I would appreciate clarification on your testing procedure as i think the principle is curious.
People keep asking about voltage and amps. If you are looking for voltage you will find none. What you will find is a very low current. Please do not use a digital multimeter. I never would have been able to detect this effect using one initially. After finding the hot spots I was barely able to get a reading on my digital meter and that was on my best performing Magtap setup. I think to see the effect at all initially you will have to have a non-digital galvanometer 500ua or better.
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