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caesius
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Homework Statement
Determine which of the five sources in Fig. (attached) are being charged (absorbing positive power), and show that the algebraic sum of the five absorbed power values is zero.
I've labelled how I'm referring to the sources in red
http://img17.imageshack.us/img17/498/circuitt.png
Homework Equations
p = vi, passive sign convention
The Attempt at a Solution
source one: p = (2v)(2A) = 4W generated (not PSC)
source two: p = (8V)(2A) = 16W generated (not PSC)
source three: p = (2V)(-4A) = -8W generated (not PSC) --> 8W absorbed
source four: p = (10V)(5A) = 50W generated (not PSC)
source five: p = (10V)(-3A) = -30W generated (not PSC) --> 30W absorbed
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So I know I'm wrong because the question wants to know which ONE is absorbing power. And the sums don't add up in the second part.
I'm clueless, been looking at this problem for a long time now, what have I missed?
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