i.e.,

                                                        ..................................(4.58)

and in the region ,

                                                                 ..................................(4.59)

Steady Magnetic Field

Example 2: Self inductance per unit length of a coaxial cable of inner radius 'a' and outer radius 'b'. Assume a current I flows through the inner conductor.

Solution:

Let us assume that the current is uniformly distributed in the inner conductor so that inside the inner conductor.