MOTM

> >HA! This begs the question (to all you EE-wannabes), "why is it done this
> >way?"
> >
> >Hint: it has to do with *chemistry*, not "electronics".
>
>[waving arm in air]
>
>I know.  I know.  Pick me.  Pick me.
>
>It's because electrons are negatively charged and flow from -
>to +, contrary to common misconception of + to -.  I think the
>military teaches it the right way.
>
>-Cary


I can pipe in here.  In the past 10 years the Nuclear navy has switched the 
way they teach this a half dozen times.  I learned it as "electron flow" 
(conventional current flow) + to - in my electrician school.  Then in 
nuclear power school they said the Navy is going to start teaching "hole 
flow".  The idea was - to +.  The hole comes from the space left by the 
electron that just "vacated" a "hole".  WHATEVER.  The idea is there is a 
difference in potential (voltage) and without it there is no current flow 
whether it is + to - or - to+.  I love this conversation.  In the end it 
usually leaves those with any insecurities in there knowledge sure of only 
one thing - they don't know anymore.

The ironic part...  I teach this now and I teach the conventional current 
flow - many nubs, as we call them, understand + to minus easier despite the 
actual physics involved.

Steve...  still in Hawaii