Answer Happy

- - Consider a coaxial cable as shown in the figure. The cable consists of a solid inner conductor of radius rı = 0.4 cm that is surrounded by a cylindrical tube of inner radius r 2 0.8 cm and outer radius 13 r3 = 1.8 cm. The conductors carry equal and opposite currents I = 1 A but the current density varies linearly with the distance from the center for the inner conductor (31 Cir) while it is distributed uniformly for the outer conductor. Determine the magnetic field (in units of u T (microtesla)) at a distance r 1.3 cm from the axis. (uo = 47 x 10-7N/A² and 1 = 3.14) - Answer: 13