Can you give an example of an inertial frame in presence of an electromagnetic field for all kinds of charged particles?
closed as unclear what you're asking by Ben Crowell, Jon Custer, ZeroTheHero, John Rennie, Chair Feb 11 at 7:28
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Presumably the OP is asking if there is any special inertial frame determined by a particular EM field, in which case the answer is often "yes". In the case where E is perpendicular to B and |E| > |B|, there is an inertial frame that is special: the one in which E or B vanishes.