2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/27017We consider quantum fluctuations of current in a metallic loop induced by varying magnetic flux. The dependence of the fluctuations on the flux change $Φ$ contains a logarithmically divergent term periodic in $Φ$ with the period $Φ_0=hc/e$. The fluctuation is smallest near $Φ=nΦ_0$. The divergence is explained by a comparison with the orthogonality catastrophe problem. The $Φ_0-$periodicity is related with the discreteness of "attempts" in the binomial statistics picture of charge fluctuations.8 pages, revtex 3.0, figures by request, M.I.T. preprintCondensed Mattertext