Find I_1 and I_2 in the network.
Image from: Irwin, J. David., and R. M. Nelms. Basic Engineering Circuit Analysis, Tenth Edition. N.p.: John Wiley & Sons, 2010.
Solution:
We will write Kirchhoff’s current law for nodes A and B (which were arbitrarily chosen). (Forgot Kirchhoff’s current law?)
Node A:
I_1=4mA+8mA
I_1=12mA
Node B:
8mA=2mA+I_2
I_2=6mA
This question can be found in Basic Engineering Circuit Analysis, 10th edition, chapter 2, question 2.12.