2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/28418A magnetic field induced electric polarization and the corresponding change of an effective junction capacitance are considered within a 3D model of disordered Josephson junction arrays. At some threshold field (near the Josephson network critical field), the effective junction charge and the related capacitance are shown to reach a maximum and to change a sign, respectively. A possibility to observe the predicted effects in artificially prepared arrays of superconducting grains is discussed.REVTEX (epsf style), 2 EPS figures. For related work see cond-matt/9807098Superconductivitytext