- #1
sandy.bridge
- 798
- 1
I'm working on an ac circuit, and we were told to use nodal analysis. Furthermore, we are asked to show a power balance between the sources and the power dissipated in the resistors, along with a reactive power balance between the sources and the inductors and capacitors.
I have this formula for the sources:
[tex]P=I_{rms}V_{rms}cos(\theta{_v}-\theta{_i})[/tex]
However, when I am using this forumla, some of power in regards to the sources is negative, and some is positive. Therefore, upon summing together each of their contributions, the power is really low in comparison to the power dissipated in the resistors. Am I supposed to be taking the absolute value of these powers or what?
I have this formula for the sources:
[tex]P=I_{rms}V_{rms}cos(\theta{_v}-\theta{_i})[/tex]
However, when I am using this forumla, some of power in regards to the sources is negative, and some is positive. Therefore, upon summing together each of their contributions, the power is really low in comparison to the power dissipated in the resistors. Am I supposed to be taking the absolute value of these powers or what?