YOU THINK YOU KNOW, BUT DO YOU?

[Fred Abse]

On Sat, 12 Mar 2005 20:56:32 +0000, Rich Grise wrote:

On Thu, 10 Mar 2005 15:07:47 -0800, Dave wrote:

I always get what I need here.

Yeah. Too bad that's so far from what you want.

ROFL!

--
Then there's duct tape ...
(Garrison Keillor)

 

[Dave]

As usual, just needed a little time for more posts to trickle in. Done.

 

[John Fields]

On Sat, 12 Mar 2005 19:50:17 -0600, "Sean Leistico"
<sleistico@kc.rr.com> wrote:

I learned it in Stagecraft class decades ago.

Ol' Mr. Peerbolte called it the West Virginia formula

The abbreviation for West Virginia (before two-letter postal codes) was W.Va

W VA

Watts = Volts x Amps

Algebra will give you the corrolaries for finding Volts or Amps

I know this formula is accurate for AC, and I'm assuming DC--can anyone give
confirmation on that?

---
It's accurate for DC, not AC.

For AC, it's:


W = VA cos(phi)

where phi is the the difference in phase between voltage and current
in the load.

--
John Fields