A charged particle of specific charge s ...

A charged particle of specific charge s moves undeflected through a region of space containing mutually perpendicular and uniform electric and magnetic fields, E and B. When the field E is switched off, the particle will move in a circular path of radius

`(E)/(BS)`

`(ES)/(B)`

`(ES)/(B^(2))`

`(E)/(B^(2)S)`

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