Re: Driving lamps, etc. -Reply

[Mike Edmonds <edmondsm@concentric.net>]

Oops, Stuart is right!

A = V/R

In addition, Power can also be expressed as P = (V x V)/R

>Matt Kulka wrote:
>Okay, I can visualize getting a cheap ammeter and connecting it between
>a battery post and cable to find out how much various things load my
>charging system.  But you can't very well measure the draw of your
>coil's primary and secondary circuits (because the alternator never runs
>without that load.)  As a point of curiousity, does anyone know how much
>juice it takes just to create the sparks?
>
>Also, what the heck is the formula for watts, voltage and amperes again?
> I haven't used it since high school.
>
>Matt Kulka.
>'74 B - with driving lights all right - mounted right there in the
>fenders where God intended them to be.
>
>The answer would be found in Ohms Law:
>              I=E/R   or  E=IR  or  R=E/I and P = (I x I) x R
>
>                   Where I stands for current in amps
>                         E is the Voltage
>                         R is the resistance in Ohms
>                         P is the Power in Watts
>
>Hope this helps..........Cheerio, Stuart   '79 MGB
>
>