g4ph-h7l_aM[/youtube] This is pret... appear at all? Can we discuss this effect?
you're tapping my oldest memory banks now.
when i was a kid had a next door neighbor hwo was a sort of Sorcerer's Apprentice, making Jacob's Ladders and the like.
I think you'll find the arc went up by simple convection like the smoke did. The ionized air is very hot...
there is a force on the charge that is moving through the arc, Q X Velocity (cross) B
but shouldn't that twist the arc parallel to conductors?
i didn't notice that in the video..
Tree branch "falls" on power lines? From nowhere on a relative wind-free day with cameras ready? Admit it, you threw it up there didn't you?
This is pretty old but it just crossed my mind. Wanted to share it with you guys.
One question though, why is that current arc going upwards? And why did it appear at all?
Can we discuss this effect?
:D I live nowhere near power lines anyway(city). But even I wanted to, chances of me putting that branch precisely that way are almost none :DTree branch "falls" on power lines? From nowhere on a relative wind-free day with cameras ready? Admit it, you threw it up there didn't you?
Ahh crossing vectors? your index finger points in the direction of the first component, your middle finger points in the direction of the second component, your thumb is showing crossed vectors.""""But this is AC, how does lorentz force apply to this when we have alternating B field."""
B alternates certainly, and so does Velocity (current in the arc is alternating )
i think you're right - if i remember how to cross vectors, the result also alternates direction hence nets to zero....... mumble mumble...c'mon old brain,,, V X B--- rotate V into B and result is direction a right hand thread would move?
was hoping youd reaffirm my old memory because i dont have my books handy. (visiting friends away from home)
am i right , my kind friend?
hahahahahaha this really made me laugh ! :rofl:memory - i can almost remember when i had one........
Yea but still its an amazing to see that much current scaled up! Before this video I only witnessed sparks. Or group of many sparks in best case.that last video is intentional opening of a disconnect switch in that yard. first second you can see it swing away.... that kind of switch cannot interrupt load current, but the simple charging current makes a plenty impressive arc.
so judging by lack of excitement by participants that video, the current was pretty small. i didnt notice molten metal falling...
I would go for electro-energetics too, if I had more access to such devices in my youth. But since I was sitting in front of computer longer than I wasn't, I went for electronics. I see by these synchronous machines, transformers... from my fundamentals of electro-energetics systems course, that there are a LOT of things that tingle my interest.power side of EE is to me more interesting than computers.
i honestly considered programming but decided it's more fun to magnetize iron by the ton than by the micron.
i was happy with DOS and QBASIC.
but that's just me.