I encountered the following problem in an exercise book for Electro magnethism. It is in a section that is used to refresh ones mathematical knowledge obtained in Calculus.
The vector field H = ( I / ( 2 pi * R) ) * phi is given in cylindrical coordinates.
The curve C is the circumference to the circle: R = a, z = 0, 0 <= pi <= 2 pi.
Calculate the line integral over the closed integral C of H* dl
Anyone that can give me some hints of the methodology to use? I have tried to solve it, but I do not succeed.