Q- Two very long coaxial cylindrical conductors with the inner cylinder has a radius a = 2 cm and caries a total current of I1 = 1.2 A in the positive z-direction and the outer cylinder has an inner radius b = 4 cm, outer radius c = 6 cm and carries a current of I2 = 2.4 A in the negative z-direction. You may assume that the current is uniformly distributed over the cross-sectional area of the conductors. What is Bx, the x-component of the magnetic field at point P which is located at a distance r = 5 cm from the origin and makes an angle of 30 degrees with the x-axis in x-z plane?
