Hi all, At 3:35 of this video they move a water drop with an electric charge. There are three electrodes, a black one that seems to be in constant contact with the water drop through the continuous trace. Then there are two red electrodes that I think are at the same potential.
That is my question, are the two red electrodes connected together?
This is an outcast in these NerdRage videos, He has 128 videos, so far cool, nerdy stuff. I think many will enjoy them. Mikek
bYA
MikekI watched this. I am pretty sure the two red probes are the same voltage. I had to really slow down and look at the shapes etched on the glass. The black probe connects to one long continuous connection and half the drop is always on that geometric shape. Along the long rectangle (which the black probe connects to) are lots of little squares. Each square floats relative to the other squares and the long rectangle.
When she moves the red probe she is charging an adjacent square and ltting the charge off the current square. The water drop then centers itself on the newly charged square which causes the movement.
bYA
MikekNice to see Canadians let their science students build bombs. Have to go to 5:25. Pretty cool.
It seems to me that the drop motion is in two stages. Firstly, when both red probes are connected, the drop moves about halfway, then when one probe is removed, the drop moves the rest of the way.
I note that she isn't taking any care to avoid having the probes touch, which is consistent with the idea that they're at the same potential anyway.
Sylvia.
Hey, that's my bar-napkin-ink-pen chromatography trick.
bYA
MikekExploding fruit and vegatables are always a crowd pleaser. :^)
George H.
Gallagher has made a living from them for decades.
Not if you're in the front row. :)
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