Calculating the magnetic field due to a straight current carrying wire of length 2L at a distance d away from its center: Questions below demonstrate how to solve this question using Biot-Savart Law correctly. A random dl is selected on the wire. In the Biot-Savart law expression dR Hol di x f what would the limits of integration if we were integrating dB ? r2 di L d L -L to +L O to d 0 to L -L/2 to L/2