On Fri, 08 Jan 2010 14:13:04 -0700, Dave wrote:

On 1/8/2010 12:25 PM E Z Peaces wrote:

1.89032 + 7.0134 + 7.7494 = 16.65312

The 7.7494 is in parallel with the rest.

Yup....I had to go back and study the diagram to see what I was missing.

So here's my most current math:

1/2.8398 (0.35213) + 1/5.6534 (0.17688) = 0.52901.
1/0.52901 = 1.89032 ohms for the first parallel circuit.
1.89032 + 7.0134 = 8.90372 combined ohms for the top part of the diagram.
1/8.90372 (0.11231) + 1/7.7494 (0.12904) = 0.24135.
1/0.24135 = 4.1434 ohms total for the circuit.
4.1434 ohms @ 12v = 34.75407 watts.


Applying the same math to the bottom puzzle:
1/46.2606 (0.02162) + 1/39.4737 (0.02533) = 0.04695.
1/0.04695 = 21.29925 ohms for the first parallel circuit.
21.29925 + 63.1579 = 84.45715 combined ohms for the top part of the diagram.
1/84.45715 (0.01184) + 1/60.0000 (0.01667) = 0.02851.
1/0.02851 = 35.07541 ohms total for the circuit.
35.07541 ohms @ 12v = 4.10544 watts.

Both of these results are right in line with my expected results.
Except 35 ohms and 12 volts is NOT 4 watts. It's 4 AMPS.
And watts is volts X amps, so the circuit is consuming not 4.105
watts, but 12X 4.105 watts which is something closer to 49 or 50
watts.