Kirchoff's Loop Rule--Direction of Current? I came across this question, and it really confused me-- how does the current decide which direction it goes? The pictures are attatched below. The first picture is of the original questions. It gives two scenarios, and asks you what the value of the current "I" is for each scenario. I didn't understand how the resistors were connected in both pictures. The second picture was an alternative method of connection for circuit 2 in the first picture, but how are the two cases were equivalent? Where did the "I" branch on the first picture go? The third picture is the calculated current for all branches in circuit two. Mathematically, everything make sense, but I would've never figured it out without the answer key. So could someone please help me with 1) Why does I=0 in the first picture circuit 1? 2) What decides the direction of current? (Higher, lower voltage drop? but I couldn't figure out which was which) 3) Which branch in the third picture is equal to branch "I" in circuit 2? Thank you so much for your help!