(adsbygoogle = window.adsbygoogle || []).push({}); http://ocw.mit.edu/courses/electrical-engineering-and-computer-science/6-061-introduction-to-electric-power-systems-spring-2007/assignments/ps1ans.pdf [Broken]

Problem #3

Where do the minus signs come from in the admittance matrix?

also, there is this statement

"Thus it is clear that R3 = 1/3 and"

and later the statement

"R12 = R3 =1"

2. Relevant equations

3. The attempt at a solution

From what I think it would be that the T circiut would be 1ohm for all three resistors, but that isnt what the solution is.

Can someone help me please understand?

thank you for your time and have a good day

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