Finding V(I) for a network with ideal current and voltage sources

[erezb84]

Homework Statement

I have "network N" that includes (resistorse, voltage and current sources), and we do 2 experiments:
1. connecting idial current source, and measuring 3V
2. connecting idial voltage source, and measuring 5A.

need to find V(I)=?

The Attempt at a Solution

Nothing much...

Can someone give me a hint, please?

Thanks.

 

[Simon Bridge]

You are expected to use the Thevenin and Norton equivalent circuits perhaps?

What is V(I) supposed to represent?

 

[erezb84]

Yes, i am expected to use them...
V(I) for points a,b.

 

[Simon Bridge]

Well... ? Have you found the Thevenin and/or Norton equivalents for the black box?

I figured that you'd want to measure V_ba but you presumably want the curve or equation for the V_ba as a function of current. But what current? The current in the circuit OK but which circuit? Can you tell me in words what V(I) represents?

I'm not asking these questions for information: those are hints.