I have this circuit that I am trying to solve for the short circuit current.
I am not extremely strong with analyzing circuits (this is finding the short circuit current for a Thevenin equivalent), but I tried solving for currents two different ways and am still wrong. I performed mesh analysis using the three squares as loops which yields these three equations (the left loop is 1, the middle is 2, the right is 3):
which gives: I1=2.1, I2=2.1, I3=2.4
Then I used the middle and rights loops using KVL with the current labelled as in the picture:
which gives Ia=2.4, Ib=-10.8, Isc=19.2
I understand the solution that they give (and I can post it but someone who is familiar with this probably doesn't need it), but what I don't understand is why my methods did not work and why they picked their particular method/loops to evaluate (it could also stem from the fact that I have not analyzed many circuits so I am inexperienced at how to approach).
This is the solution as given: