so you know the basic experiment where you oppositely charge some plates set vertically and dangle an aluminum ball attached by string between them? the ball basically gains charge from one side, becomes attracted to the other, and starts bouncing back and forth.
a friend of mine demonstrated this, and i suggested setting it horizontally, so we could watch balls bounce up and down endlessly. after surrounding the charged plates so the balls couldn't escape, we started throwing them in. as expected, they bounced crazily.
then we started making different shapes out of the foil. most of them bounced sporadically. BUT THEN, something crazy happened. i had wrapped an aluminum foil strip around a small cylinder to make a spiral shape. the length of the spiral cylinder was about half the width of the plates(1.5 inches ish). first it bounced around and then very quickly, started moving more regularly. it started spinning, very wobbly, and moving in between the plates up and down without touchhing them. then after a few moments, it appeared to be spinning very rapidly, was fully upright and essentiallly levitating in place between the plates(in the middle). STEADY STATE!!! you could also see arcing between the plates and the bottom and top ends.
what induced the spin? first i assumed it was a mechanical phenomenon, but then i made a heavier top-like shape. this moved randomly, then stabilized as well, spinning, and remained upright resting on the bottom plate. it was axial symmetric(unlike the spiral) but spinning was still induced.
anyone have any idea what is causing this phenomenon? it looks awesome, so i recommend trying it. i will take some pictures/video soon and post it online to show what i'm talking about. i'm just really curious about why this is happening.
a friend of mine demonstrated this, and i suggested setting it horizontally, so we could watch balls bounce up and down endlessly. after surrounding the charged plates so the balls couldn't escape, we started throwing them in. as expected, they bounced crazily.
then we started making different shapes out of the foil. most of them bounced sporadically. BUT THEN, something crazy happened. i had wrapped an aluminum foil strip around a small cylinder to make a spiral shape. the length of the spiral cylinder was about half the width of the plates(1.5 inches ish). first it bounced around and then very quickly, started moving more regularly. it started spinning, very wobbly, and moving in between the plates up and down without touchhing them. then after a few moments, it appeared to be spinning very rapidly, was fully upright and essentiallly levitating in place between the plates(in the middle). STEADY STATE!!! you could also see arcing between the plates and the bottom and top ends.
what induced the spin? first i assumed it was a mechanical phenomenon, but then i made a heavier top-like shape. this moved randomly, then stabilized as well, spinning, and remained upright resting on the bottom plate. it was axial symmetric(unlike the spiral) but spinning was still induced.
anyone have any idea what is causing this phenomenon? it looks awesome, so i recommend trying it. i will take some pictures/video soon and post it online to show what i'm talking about. i'm just really curious about why this is happening.