1. The problem statement, all variables and given/known data In the system shown in the picture, there's a current whose constant density is J=0,5A/mm^2. System contains two pieces as shown in the picture, in the area where two pieces intersect, there's no current. If R=1mm and a=1,25mm (a - distance between centers of the circles), find the vector B in at points P1 and P2. 2. Relevant equations Biot-Savart law 3. The attempt at a solution I think i should solve this using superposition, or even better, find the B for the first part and multiply it by two in both cases (P1 and P2) since i should get the same value for both parts of the system. Now, i could think of the first part as lot of lines with current flowing through them, then i could sum up (integrate) all lines in that area and find the value B. The problem is, how to find area?