2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/87974In recent times there has been a renewed interest in the force experienced by a charged-particle with anomalous magnetic moment in the presence of external fields. In this paper we address the basic question of the force experienced by a spin-1/2 point-like charged-particle with magnetic and electric moments in the presence of space-and time-dependent external electromagnetic fields, when derived from the Dirac equation {\em via} the Foldy-Wouthuysen transformation technique. It is interesting to note that the force thus derived differs from the ones obtained by various other prescriptions.10 pages. (Communicated) http://www.pd.infn.it/~khan/ and http://www.pd.infn.it/~pusterla/Classical PhysicsHigh Energy Physics - TheoryOn the form of Lorentz-Stern-Gerlach forcetext