In the figure, four long straight wires are perpendicular to the page, and their cross sections form a square of edge length a = 15.0 cm. Each wire carries 6.00 A, and the currents are out of the page in wires 1 and 4 and into the page in wires 2 and 3. In unit-vector notation, what is the net magnetic force per meter of wire length on wire 4? I ONLY NEED THE i COMPONENT OF THE ANSWER

Two long straight current-carrying wires are lined up parallel to one another at a distance dd. Currents of 4 A and 2 A flow through the wires, both in the same direction generating the field of 8.7x10-6 T at a midpoint between them. Calculate the distance between the wires. Give your answer in SI units. Use μ0=4π×10−7μ0=4π×10−7 Hm-1.

The figure below shows the cross section of a long cylindrical conducting cylinder of radius a = 0.0896 m. The current density in the cross section is given by J = (7.66 × 106 A/m³) r. Where inside the cylinder does the magnetic field have a magnitude of 1.08 × 10-³ T? i m a r

In the figure below, four long straight wires are perpendicular to the page, and their cross-sections form a square of edge length a = 10.5 cm. Each wire carries 8.00 A, and the currents are out of the page in wires 1 and 4 and into the page in wires 2 and 3. What is the magnitude and direction of the net magnetic force per meter of wire length on wire 4? magnitude      N/m direction      ° (counterclockwise from the positive x-axis) (please show units. It really helps me out)