Hello!

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.

Task:

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

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Anyone that can give me some hints of the methodology to use? I have tried to solve it, but I do not succeed.

Thanks!

Anders Branderud

bloganders.blogspot.com