Response to 'Comment on "Analytical solution for transient, diffusing fields inside a ring conductor with rectangular cross section (IET SMT 2008 Vol. 2 No. 5)" by Gratkowski and Ziolkowski'.

Analytical solution for transient, diffusing fields inside a ring conductor with rectangular cross‐section is discussed. Some details from the paper by V. Thiagarajan with additional clarifications are presented. The comment paper on the Thiagarajan analysis by Gratkowski and Ziolkowski criticises the boundary condition used at the outer radius of the ring conductor and changes it by setting the vector potential to zero at the outer radius of the ring. It is shown that: (i) the boundary condition used by Thiagarajan is an exact analytical result from classical physics, arising from interface field continuity criterion, (ii) setting the vector potential to zero at the outer radius of the ring is not a physically valid boundary condition, and (iii) it changes the boundary value problem entirely with no comparison to the analysis commented upon (which is valid mathematically and physically). [ABSTRACT FROM AUTHOR]