volume 15, issue 8, P1057-1059 1985
DOI: 10.1070/qe1985v015n08abeh007349
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Abstract: The conditions of equilibrium are obtained for a charged t a t particle in the field of a spherical charged mass, Einstein-Maxwell theory is used. Tbe classical condition q1q2= Gm,m, is neither necessary nor sufficient, whereas q1 =*G1'2m,, q2=*G1"m2 is sufficient but not necessary. There are also reparation-dependent equilibrium positions, and some ofthese allow the charges to have opposite signs. Stability to radial displacements is investigated.