 #1
 10
 1
Homework Statement
Find the Thevenin equivalent at terminals ab
V1 = 70V
V2 (dependent) = 4Vo
R1 = 10Kohm
R2 = 20Kohm
Homework Equations
##V=RI##
##1/req = 1/r1 + 1/r2 + ... +1/rn##
The Attempt at a Solution
Found the current i = 1mA by KVL using Vo = 10ki then did source transformation for both tension sources: 7mA and 2mA, parallel with 10kohm and 20Kohm respectively. Then, calculated the equivalent resistor (20/3)kohm and subtracted the 7mA by the 2mA current sources. Transforming again, It gives me Vth = 33,3V and Rth = 6,6kohm but the answer is 60V and 2.9kohm.
I've tried many times this exercise with source transformation (as some others), had different results, and sometimes looks like that the source transformation doesn't work so generally that i thought (or i'm applying it in a wrong way).
Attachments

8.8 KB Views: 437