2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/112149A very good as well as simple approximate solution is suggested to the problem which flat circular distribution of electric current in finite film produces a given axially symmetric distribution of normal-to-film magnetic field.2 pages, 2 figures, RevTex4, typos added, Poster submitted to Int. Conf. on Low-Temperature Physics in Kharkov, Ukraine, June 2006Other Condensed MatterSuperconductivitytext