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

Options

A. `((mv^(2))/R)2piR`
B. zero
C. `BQ2piR`
D. `BQv2R`

Answer

B

Explanation

Force is perpendicular to displacement.

`implies` Work done `vecF.vecd=0`