Question

2. Find the magnetic field as a function of radius for the following: a current,I, running up the page in a thin wire surrounded by a thick, cylindrical shell, inner radius R_1, outer radius R_2, carrying a constant current density J down the page. The direction of the magnetic field is interesting. When r < R_1, you should be able to give a direction. When r > R_2, find an expression which governs the direction of the magnetic field. In the middle region,R_1> r > R_2, find another expression which determines the direction of the field. This will be similar to the previous expression, but it should differ slightly.

Answer 1