>>> Ohm's law refers to circuits, though.  Not static fields or
>>> components?
>>
>> My question here is whether "static fields" isn't a simplification for
>> saying "/very/ low current situations".
>
> No.  Get into things like electron microscopes or particle
> accelerators, and electric fields become things very distinct indeed
> from currents.
>
> What would your static magnetic field represent a "very low current"
> OF, anyway?
>
> Heisenberg's uncertainty principle enters the picture if you actually
> want to MEASURE zero, of course.  While it's usually thought of in
> terms of the uncertainty of a non-zero value, measuring exactly zero
> violates it just as ... certainly.
>
> (or...  Think of most of electronics as a "bulk" simplification of
> electron physics.  Things like single electrons clearly have an
> electric field, whether they're involved in current flows or not...)

This seems to say that 0 (voltage, current, resistance) is outside of the
realm of Ohm's law. And that nobody has yet been able to confirm a
resistance of 0 (because that would require to be able to measure a voltage
of 0).

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