  We study the capture cross-section of charged particles by a weakly charged
Schwarzschild black hole. The dependence of the maximum impact parameter for
capture on the particle's energy is investigated numerically for different
values of the electromagnetic coupling strength between the particle and the
black hole. The capture cross-section is then calculated. We show that the
capture cross-section is independent of the electromagnetic coupling for
ultra-relativistic particles. The astrophysical implications of our results are
discussed.
