  We consider the equatorial circular motion of a test particle of specific
charge q/m << 1 in the Kerr-Newman geometry of a rotating charged black hole.
We find the particle's conserved energy and conserved projection of the angular
momentum on the black hole's axis of rotation as corrections, in leading order
of q/m, to the corresponding energy and angular momentum of a neutral particle.
We determine the centripetal force acting on the test particle and,
consequently, we find a classical pseudo-Newtonian potential with which one can
mimic this general relativistic problem.
