1 Consider the annulus S in the plane z = 8.3m, defined by a <+ <, a = 3.3 m, b 4.4m. The region surrounding S is filled with a conducting medium, where the current density is given as follows in spherical coordinates: ao A/m? r sin(0) Find the net upward current through S. ANSWER: I 4pi(4.4^2-3.3^2)

1 Consider the annulus S in the plane z = 8.3m, defined by a <+ <, a = 3.3 m, b 4.4m. The region surrounding S is filled with a conducting medium, where the current density is given as follows in spherical coordinates: ao A/m? r sin(0) Find the net upward current through S. ANSWER: I 4pi(4.4^2-3.3^2)