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Núñez Jiménez, Manuel 2019-12-18T11:58:35Z 2019-12-18T11:58:35Z 2012 PHYSICAL REVIEW D 85, 104038 (2012) 1550-7998 http://uvadoc.uva.es/handle/10324/39941 10.1103/PhysRevD.85.104038 104038-1 10 104038-10 Physical Review D 85 1550-2368 We study the possibility of growth of the electric and magnetic fields in a force-free plasma due strictly to the gravitational curvature of the spacetime domain where those fields lie. To this end, we identify a total energy by analogy with the results of classical magnetohydrodynamics. After obtaining the general evolution equation for the total energy, we apply to it to the fiducial observers in a number of classical metrics: Schwarzschild, Boyer-Lindquist, Kerr-Schild, Robertson-Walker, and post-Newtonian approximation. As a rule the shift velocity plays the role of minus the fluid velocity in Newtonian MHD, but the details are often highly intricate. eng info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by-nc-nd/4.0/ Attribution-NonCommercial-NoDerivatives 4.0 Internacional Dynamo effect of spacetime curvature in force-free magnetospheres info:eu-repo/semantics/article