A coaxial cable of length H is composed of two cylindricalconducting shells. The inner shell has radius A and is centeredinside the outer shell of radius B. Both conductors carry aconstant current of magnitude I. Assume H >> B and ignore anyedge effects. Use this diagram to answer the following 4 questions.Let r be a vector pointing from the center of the cable to anypoint in space.
1. Find the B field in the regions r < A , A < r < B and r> B
2. Find the magnetic flux (Φ) through the hashed rectangularcrosssectional area between the two cylinders.
, surrounded by a concentric cylindrical tube of inner radius 
and outer radius 
. The conductors carry equal and opposite currents 
distributed uniformly across their cross-sections.
from the axis.
