> A little time spent on Ohm's Law while you're at it won't hurt much.  :)
>
> The mathematical analogy is a much better description of what
>
> actually happens in simple DC circuits.
>
>
Lindy, the following relates to my experience when learning the basics but
it may be a source of additional confusion.  So you may wish to treat it
accordingly.

I personally never liked the use of analogies when I was studying, I would
always prefer the professors talked about the actual phenomenon that was on
topic.  It does help many but many also get lost and bogged down in the
analogy.

And the discussion of resistance was always cause for concern ... as
resistance gets LARGER-BIGGER the current gets SMALLER-LESS???. Doesn't
sound intuitive.  LARGER-BIGGER can seem like the professor is referring to
cable size or BIGGER may seem like BETTER.  Looking back I always wondered
if the discussion of ohms law in term of  conductance  (G) would be better.
That is as conductance gets larger the current gets larger, as conductance
gets smaller the current gets smaller (for a given voltage.)

V =3D I /G

Zero conductance ... nothing flows.  Sounds more intuitive than Infinite
resistance ... nothing flows.

Justin
--=20
http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist
.