Solve

A Y X X X X X X X X X X X Two very long coaxial cylindrical conductors are shown in cross-section. The inner cylinder has radius a = 2 cm and carries a total current of I1 = 1.2 A in the positive z-direction (out of the page). The outer cylinder has inner radius b = 4 cm, outer radius c = 6 cm, and carries a total current of 12 = 2.4 A in the negative z-direction (into the page). The current in both cylinders is uniformly distributed over their respective cross-sectional areas. A point P is located at a distance r = 5 cm from the origin and makes an angle of 0 = 30 with the x-axis. What is By, the x-component of the magnetic field at point P? By = T