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eehelp150
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Homework Statement
Calculate the complex power delivered by the source
V = 12cos(wt) V
Homework Equations
V = IR
The Attempt at a Solution
1. I combined 8ohm resistor and 8j ohm inductor in parallel to get 4+4j ohms
2. I combined that with 4ohm resistor in series to get a Zth of 8+4j ohms
3. V = IR -> I = V/R = 12/(8+4j) amps
4. I = 6/5 - 3i/5
Complex power = V * I conjugate =
12 * (6/5 + 3i/5)
= 14.4 + 7.2i
Did I do this right?