Timeline for What is the physical reason a $+5V$ equipotential coutour cannot intersect a $-5V$ equipotential coutour?
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| Jan 6, 2012 at 4:14 | comment | added | ThePopMachine | Furthermore, it's imperfect without resorting to overhangs because you can have discontinuities in altitude (as you cross a cliff) but you can't have that in potential because then the magnitude of the electric field would have to be infinite at that point -- or think of it as something like a capacitor of zero width. | |
| Jan 5, 2012 at 3:28 | comment | added | David Z | Height can actually be a multivalued function because of overhangs and such - I've seen contour lines on topo maps cross. But that just makes it an imperfect analogy. Potential is of course single-valued. | |
| Jan 4, 2012 at 13:22 | history | answered | Colin K | CC BY-SA 3.0 |