Interaction between a stationary electric charge and a stationary magneticdipole

Using Einstein-Maxwell theory I investigate the gravitational held generate d by an electric charge and a magnetic dipole, both held in fixed positions , but spinning with prescribed angular momenta. There is a conical singular ity between them representing a strut balancing the gravitational attractio n of their masses. However, there is in general another singularity, which I call a torsion singularity. I interpret this as a couple needed to mainta in the spins at their prescribed values. It vanishes when the parameters ob ey a certain formula. A conclusion of the work is that the charge and the m agnet must spin relative to one another unless constrained by a couple. (C) 2001 Elsevier Science B.V. All rights reserved.