Date:         Sat, 4 Apr 2009 23:52:53 -0700
Reply-To:     David Kao <dtkao0205@YAHOO.COM>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         David Kao <dtkao0205@YAHOO.COM>
Subject:      Re: Learning Electricity Part Three
Comments: To: David Beierl <dbeierl@ATTGLOBAL.NET>
In-Reply-To:  <49d82eb3.47c2f10a.1936.ffffcde2@mx.google.com>
Content-Type: text/plain; charset=us-ascii

Sigh! You went over everything in 3 days or 3 emails. I remember
my circuit theory text book was almost one inch thick and it only
talked about RLC (resistor, inductor and Capacitor) only. It took
a year to get credits for it. It took you only 3 emails (days)
to get it done although it touches only resistor but no LC.

Go to a library and look for books talking about using a volt amp
ohm meter. It will be fun to read.

It is really a good idea to keep a cheap analog meter in the Vanagon.
Don't forget to change the battery inside to keep it in good working
order. You don't want the Van's and the meter's batteries both lose
charge at a same time.

Good job, David.


--- On Sat, 4/4/09, David Beierl <dbeierl@ATTGLOBAL.NET> wrote:

> From: David Beierl <dbeierl@ATTGLOBAL.NET>
> Subject: Learning Electricity Part Three
> To: vanagon@GERRY.VANAGON.COM
> Date: Saturday, April 4, 2009, 8:50 PM
> And on the third day God created the Formula, and named it
> Ohm's Law.
>
> The fundamental formulas that link these units together are
> thus:
>
> E = I x R  and  P = E x I.
>
> E is electromotive force, in volts.  I is flow rate, or
> current, in
> amps.  I've no idea why it's the letter I.  R is
> resistance, in ohms,
> and P is power, in watts.
>
> These rearrange to: I = E / R;  R = E / I;  E = P / I;  I =
> E / P
>
> and by combining them further derive: P = I^2 x R;  P = E^2
> / R
>
> With these formulas you can understand what's going on
> in any part of
> a typical automotive circuit.
>
>  --
> David Beierl - Providence RI USA --
> http://pws.prserv.net/synergy/Vanagon/
> '89 Po' White Star "Scamp"