Thevenin Equivalent Circuit


by Phillipe
Tags: circuit, equivalent, thevenin
Phillipe
Phillipe is offline
#1
Jun13-11, 10:37 PM
P: 10
1. The problem statement, all variables and given/known data

Find the Thevening Equivalent Circuit for the following circuit:



2. Relevant equations

KVL, KCL.

3. The attempt at a solution

First of all, I calculate the current in the middle mesh, which I'll call i2:

[tex] - j25 = ({i_2} - {i_1})(3 + j4) + {i_2}(10)[/tex]

where i1 is the current defined by the current source. Once I've got i2, I multiply that by 10 to get the voltage in the 10 ohm resistor, and after that I calculate Vab using:

[tex]{V_{ab}} = j25 - 10({i_2})[/tex]

However, the result is incorrect (should be 22,2 V with a 98 angle). What am I doing wrong? I've used the same method with other circuits and it worked just fine.
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tiny-tim
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#2
Jun14-11, 06:28 AM
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