The current density inside a long, solid, cylindrical wire of radius a=4.8 mm is in the direction of the central axis and its magnitude varies linearly with radial distancer from the axis according to J- Jor/a, where Jo-290 A/m². Find the magnitude of the magnetic field at a distance (a) r-0, (b) r-3.1 mm and (c) r-4.8 mm from the center. (a) Number (b) Number (c) Number Units Units Units

The current density inside a long, solid, cylindrical wire of radius a=4.8 mm is in the direction of the central axis and its magnitude varies linearly with radial distancer from the axis according to J- Jor/a, where Jo-290 A/m². Find the magnitude of the magnetic field at a distance (a) r-0, (b) r-3.1 mm and (c) r-4.8 mm from the center. (a) Number (b) Number (c) Number Units Units Units