1. The problem statement, all variables and given/known data http://www.xtremepapers.com/papers/...and AS Level/Physics (9702)/9702_w04_qp_2.pdf number 6b 2. Relevant equations V=IR E=IR+Ir maybe 3. The attempt at a solution Im not sure why the line which is supposed to be drawn passes through the top right corner. Also, im not sure how to go about the second part.. how to find the resistance at C? I dont know the PD across it. What am i missing?