A water drop in electrostatic orbit around a needle in 0𝑔pic.twitter.com/G2x3Ud195K
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Cool. Why does it come back to the left at the end?
it must be that the charge isn't uniformly distributed along the needle .. that's all i can come up with
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Was thinking about that too. For an infinitely long uniformly charged needle I wouldn't expect a net force along the axis of the needle; as soon as you make the needle's length finite tho, the drop should experience a left/right imbalance.
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I think the sharp curvature towards the left end of the needle also affects field strength (causing the droplet to be drawn closer and orbit faster). Same reason why lightning rods are spiked to disperse charge efficiently
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