I find the "expose" word very useful. Thanks William.
Here's another one intended to cause irritation.
:)
Suppose you have a large, neutral copper plate. It's suspended by
insulators. If a nearby human scuffs on a rug which causes their body to
become positively charged, and if they bump their knuckles against our
neutral metal plate, what happens?
Positive charge spreads outwards across the plate at a velocity of nearly
"c."
But how can this be, since the charge velocity during electric currents in
copper is extremely low, and since the positive charges in copper are not
even mobile?