일반물리학 2 — Magnetic Fields Due to Currents: Problem 31

31 Figure 29-43 shows two very long straight wires (in cross section) that each carry a current of 4.00 A directly out of the page. Distance \(d_1 = 6.00 \text{ m}\) and distance \(d_2 = 8.00 \text{ m}\). What is the magnitude of the net magnetic field at point \(P\), which lies on a perpendicular bisector to the wires?