In a uniform field, a particle with initial velocity perpendicular to the magnetic field moves in a circle with radius $R$ that depends on the magnetic field strength $($B$)$ and the particle mass $(m),$ speed $(v),$ and charge $(q)$ has the formula of

$B\frac{v}{m}q$

$m\frac{v}{q}B$

$\frac{v}{m}Bq$

None