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## Homework Statement

This problem has two parts, so I might as well inquire about both.

https://www.edx.org/static/content-mit-6002x/images/circuits/H4P3%20Thevenin.2b9528ba9f62.png [Broken]

The figure above shows a circuit with a linear current-controlled-voltage-source and its Thevenin equivalent model as seen from Port A. Given that I0=2A,Z=2Ω,R1=2Ω,R2=4Ω, Determine the Thevenin voltage VTH and the Thevenin resistance RTH.

https://www.edx.org/static/content-mit-6002x/images/circuits/H4P3%20Norton.cbefdbaf69ef.png [Broken]

The figure above shows a circuit with a linear voltage-controlled-voltage-source and its Norton equivalent model as seen from Port B. Given that Vo=5V,A=2,R1=1Ω,R2=3Ω,R3=5Ω, determine the Norton current IN and Norton resistance RN.

For the first, they want the equivalent Thevenin voltage and resistance, for the second, the equivalent Norton current and resistance.

## Homework Equations

KCL, KVL, Thevenin/Norton, all the standard stuff you'd expect.

## The Attempt at a Solution

OK, let's start with the second one and work from there, as that is the one I got further on.

Firstly, I used KCL between R1 and R2 and got 7.5 V for the value of u, giving me the dependent voltage source's value.

I then used KCL at the node above R3 and the dependent voltage source-got -35 volts, which seems weird. Maybe I screwed up on that(I'm checking again but I'm getting the same thing)?

After that, I should find the resistance-and using both that and the Thevenin voltage, I should be able to find the Norton current, as Thevenin resistance is equal to Norton resistance.

What I'm stuck on is the dependent voltage source... what exactly should I do about that? I know the independent one becomes a short, should I use a test resistance? I thought that was only for when you had only a dependent source.

Thanks in advance.

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