Dave wrote:
perfect example. a large scale dry example of colliding dust particles
building an electric field, without need for them hitting a metalic
conductor. dust particles pick up charge by bouncing off each other and the
ground, there can actually be quite a high electric field built up.

Is the charge on those dust particles electron based?
When cave men rubbed amber on wool to charge it up,
was that electrons?

One time at a hotel in Odessa, TX, I walked across a
wool carpet with leather shoes, went potty, and drew
a two inch arc. OUCH!
--
73, Cecil http://www.qsl.net/w5dxp