A current i is uniformly distributed over the cross-section of a long hollow cylindrical wire of inner radius R 1 and outer radius R 2 . Magnetic field B varies with distance from the axis of the cylinder as

Question

A current i is uniformly distributed over the cross-section of a long hollow cylindrical wire of inner radius R 1 and outer radius R 2 . Magnetic field B varies with distance from the axis of the cylinder as, , , ,

MARKS App · Accepted Answer

Using Ampere's circuital law B = 0 for r ≤ R 1 B = μ 0 i 2 π R 2 2 - R 1 2 r 2 - R 1 2 r For R 1 ≤ r ≤ R 2 and B = μ 0 2 π i r r ≥ R 2 The corresponding B - r graph will be as shown in

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