A simpler version and memorizable is:

_ P_ _ E_
I ! E I ! R

PIE and EIR is all you have to remember fill in any two values and divide
top from bottom and multiply across. example:
P/I=E, P/E=I, IxE=P E/I=R, E/R=I, IxR=E

P=Watts (power or VA)
I = Amps (current or flow)
E = Volts (EMF electromotive force)
R= Ohms (Resistance)

Graphics are not good in a text editor but consider the underlines are
solid and the exclamation point is solid and conected to the line also put
a circle around each set of three. With that in mind, if you have any two
you can get the other two, this is for DC only by the way. This was also a
Navy school way of remembering the basics. The other one so fondly
remembered was:

"Bad Boys Rape Our Young Girls Behind Victory Garden Walls"

for the resistor collor code. As you can see it was way before "Tail
hook"



At 17:53 20 March 2009, ContestID67 wrote:
Yes, in the upper left hand corner it should be Watts X Ohms (not
additive). Turn your head sideways. ;-)

E=3DIR is what they taught me in Electrical Engineering school (and
everyone else in the electrical field I believe), so, yeah, it is "out
there". For me I simply cannot say "Voltage equals amps times ohms".
V=3DAO sounds like a fraterity. Your mileage may vary and we both get
the same values and don't melt wires and stuff.

WARNING - Boring science content below...

E =3D "electromotive force" (EMF)
I =3D the German Intensit=E4t meaning "intensity".

Go figure. Blame it all on Herr Ohm. At least the R still is the
letter that starts resistance (which came from the German resistanz it
seems).

John "Eee equals Eye Are" DeRosa