On Thu, 03 Jun 2021 14:02:23 +0100, 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?

Bill


Only if there is a potential difference over the junction. Two disimilar
metals can cause a current (electron) flow depending on the
temperature at the join.