On 03/06/2021 14:02, williamwright wrote:
If two conductors are merely touched together electricity can flow
between them. That just seems too easy somehow. I mean, just touching?
That's ridiculous. I've always thought that it ought to need more
intimate bonding between conductors for current to flow. Even if the
conductors aren't touching, sometimes there's a spark.

Another question. Why do I wonder about such things?

I guess touch points are a singularity, but while they represent a small
diameter they also represent a very short one too.

R = p(resistivity) x A / L

As L tend towards being infinitely short then the resistance from
touching conductors is minimal.

Nothing wrong with trying to understand things that aren't immediately
obvious.

BICBW