When Should Graphical Methods Be Used Over Nodal Analysis in Phasor Problems?

[Luongo]

1. I was just wondering WHEN i would use the graphical method to add phasors using cos law or sin law given inductors current lags voltage by 90 degrees and capacitors current leads by 90 degrees. When would i solve the problem graphically and when could I just use modified nodal analysis? when dealing with AC circuits? I'm having a hard time knowing when to use the graphical method or when to use nodal analysis with equations and unknowns

Homework Equations

3. is there a rule of thumb you guys use? any experts on phasors for electrical engineering?

 

[jbsteele]

The best approach to solve phasor problems is to first determine the type of circuit you are dealing with. If it is a simple AC circuit with only one source, then a graphical method is usually the most efficient way to solve the problem. If the circuit contains multiple sources, then nodal analysis with equations and unknowns may be the better choice. Ultimately, it is up to you to decide which method best suits your needs.