Question $4(1$ point$)$

A charged particle is moving with speed $v$ perpendicular to a uniform magnetic field.

A second identical charged particle is moving with speed $2v$ perpendicular to the same magnetic field. If the frequency of revolution of the first particle is $f,$ the frequency of revolution of the second particle is

$2f$

f$/4$

f

$4f$

$\frac{f}{2}$