I'm confused about how to assign the voltage polarities on circuit elements. Below is an example about what I'm confused about: http://img520.imageshack.us/img520/5075/circuitly2.jpg [Broken] So applying the Kirchoff's Law to the left loop, I get: -5 + 54000i1 - 1V + 186000i1 = 0 So far so good. It's doing the Kirchoff's Law to the right loop that I get confused: If let's say we do a clockwise loop starting below the 8V, we'll get -186000i1 + v + ... + 8 = 0 So in this case, how do I know where to place the positive terminal on the 1.8k resistor? because it does make a huge difference where I place it. Any help would be greatly appreciated, thank you.