I have a question regarding using KCL / KVL to analyse the circuit below to find all currents and voltages.
My question is : When performing KCL at the top centered node, what way should I assume that Iz is flowing? Should I assume Iz is flowing with the arrow (out of the node) that is given in the question, or assume it goes into the node based on the voltage drop of -2V over the series resistor?
What is confusing me is when I work out my Iz current, I get a positive value flowing into the resistor, but that doesn't seem correct with a voltage drop of -2V?
I am happy to post my full solutions if anybody would be happy to check them?
Thanks for any replies.
Thanks for the great answers everyone.
Yeah I think my mistake was assuming they were pure resistors for some reason but now I see how I could actually get negative voltage drops over the 'black boxes'. I think that was what I was struggling with.
Anyway here my solutions for all unknown voltages and currents for the same circuit below: