I am currently learning the Node voltage method to get a better know how about circuits. Let's say you have the following circuit:
This is the workout example with all the nodes. IMHO, I disagree, I think there is one node missing and the circuit should be as follows:
I thought that the definition of a branch was that it could only contain 1 and only 1 element (doesn't matter what element it is). When using the first circuit the current source I5 and the resistor R4 would be in the same branch, right?
Question: Then why is this the final answer? Am I missing something? Is it wrong to add N3?