If one switches to a frame with instantaneous
velocity v, the magnetic part of the force vanishes The motion of the
charged particle is then explained by arguing that there exists an
appropriate electric field in the new frame We shall not discuss the
details of this mechanism However, we stress that the resolution of this
paradox implies that electricity and magnetism are linked phenomena
(electromagnetism) and that the Lorentz force expression does not imply
a universal preferred frame of reference in nature