A beam of protons move undeviated through a space having transverse electric and magnetic fields. these fields are mutually perpendicular and their values are 120KV/m and 50mT respectively. if the beam strikes a grounded target then what will be the force exerted by beam on target. given that current is 0.8mA. Assume perfectly inelastic collision.
you know initial velocity as the fields are velocity selector...then what?