  Considering the geometry of Reissner-Nordstr\"{o}m (RN) black hole immersed
in magnetic field we have studied the dynamics of neutral and charged
particles. A collision of particles in the inner stable circular orbit is
considered and the conditions for the escape of colliding particles from the
vicinity of black hole are given. The trajectories of the escaping particle are
discussed. Also the velocity required for this escape is calculated. It is
observed that there are more than one stable regions if magnetic field is
present in the accretion disk of black hole so the stability of ISCO increases
in the presence of magnetic field. Effect of magnetic field on the angular
motion of neutral and charged particles is observed graphically.
