- #1

ElijahRockers

Gold Member

- 270

- 10

## Homework Statement

The current i_o = 8A, Voltage v_g = 480 V.

a) Find the value of R.

b) Find the power supplied by the voltage source.

## The Attempt at a Solution

Well, I noted both pairs of series resistors, to make the calculations a little simpler, and what I ended up with was this delta-Y or Y-delta formation (not sure, just saw something about it on a post here while digging around).

I figured that the voltage drops across each resistor MUST equal 480V, so I started setting up the equations, but I'm not sure if I really did it right.

There were 5 other currents which are not given. I dubbed the one passing through 'R' to be I

_{3}, the one passing through the 4ohm resistor to be I

_{1}, the one passing through the 20ohm resistor series as I

_{2}, and the one passing through the 10ohm resistor as I

_{4}. I dubbed the current flowing through the voltage source to be I

_{s}.

Doing what I hoped was an accurate KVL of that freakin triangle thing, as well as some KCLs, I came up with 5 equations, with a total of 6 variables including the Resistor....

At this point I'm pretty sure I've done something wrong, but I'm not sure what?

Part B should be easy once I find Part A.