Electrical Engineering Stack Exchange is a question and answer site for electronics and electrical engineering professionals, students, and enthusiasts. It only takes a minute to sign up.
Sign up to join this community
Would the following be the correct approach? I am a bit concerned with node C as it introduces another unknown. Do I need to write a constraint for this problem?
$$A: ((A-Ref)/4000) + ((A-B)/2000) - .002A = 0$$
$$B: ((B-A)/2000) + ((B-Ref)/2000) + ((B-C)/2000) = 0$$
$$C: ((C-B)/2000) - I(source) + .002A = 0$$
Equation C in you system is not solvable because there is no good way to tell what the current of the 12V source is without solving the system first. The beauty of this problem is that voltage at point C is known because the source grantees that point C is held at 12V. This gives you two unknowns A and B and two equations to solve for them.
Since Node C is directly connected to the Voltage source. Hence you can always replace node C with (12 + Ref).
This would make things easier for you. You can also choose Ref to be 0 V to further simplify the math involved.
