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Re: [Phys-L] amusing electrostatics exercise


On 2013, Feb 27, , at 11:33, John Denker <jsd@av8n.com> wrote:


HOWEVER with a short wire that tactic does not work. There is some
serious physics here that you ignore at your peril.


I specifically specified: "For simplicity assume infinite length." To avoid the prob. discussed at length.


This was a prob. in the qualifying exam at UCSC. (ca 1990) the only other one I remember was on the hydraulic jump, probably, because I'd read about it in Sci. Am. somewhat earlier.


bc thinks another avoidance is to specify the field due to the wire only.