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Homework Statement
The variable resistor R in the ciruit is adjusted for maximum power to Ro. what percentage of total power developed in circuit is transfered to R.
Homework Equations
i=V/R
The Attempt at a Solution
So my goal is to put a "fake" charge across v/2(the dependent source) of 1A facing upwards. The R0 is at the very top of the circuit(the one with no value, above 7.)
Since I know i3=1A I need equations for i1 and i2
5i12i2=217
2i1+10i2=0
Solving for i1/i2..
i2=9.3A
i1=47.1A
From here, I know I need Vab which is V across the 1 ohm resistor minus V across the 3 ohm resistor
1(i2i3)+3(i1i3)=vab
1*10.3+3*47.1=vab
151.69=vab
151.69V/1A=151.69 ohms
The answer is meant to be 3, I also solved it the other way(calculating for Voc and Isc) and got 3 ohms for my answer. I don't know what I did wrong using this method.
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