A particle of mass M and charge Q moving...

A particle of mass `M` and charge `Q` moving with velocity `vec(v)` describe a circular path of radius `R` when subjected to a uniform transverse magnetic field of induction `B`. The work done by the field when the particle completes one full circle is

`BQv 2piR`

`((Mv^(2))/R)2piR`

Zero

`BQ2piR`

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