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Complex Notation  Electrical Circuit 
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#1
May712, 04:05 PM

P: 7

1. The problem statement, all variables and given/known data
1 (a) using complex notation, find an expression for the output voltage, v0 1 (b) using complex notation, find an expression for the input current, ig, and hence determine the phase angle of ig relative to vg 2. Relevant equations 3. The attempt at a solution See attached two attempts, in jpgs. I've gotten myself very confused!! If someone could advise that would be great. 


#2
May712, 07:41 PM

Mentor
P: 11,626

1.2 mH is not the same as 0.001 H; you've dropped a significant figure. This in turn has significantly altered your impedance value for the inductor, with the error propagating through your further calculations.
The input is specified as a voltage source, and you've treated it as a current. This is not correct. You've then assumed that both the resistor and the inductor are conducting the entire "current" of 40A. They are in parallel so this is not possible; Parallel branches have the same potential difference, but not necessarily the same current. It's series components that have the same current. 


#3
May912, 03:33 AM

P: 7

Thank you gneill, i'll have to look at it and perhaps get a physics tutor.



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