A singly ionized magnesium atom ($A = 24$) ion is accelerated to kinetic energy 5 keV, and is projected perpendicularly into a magnetic field $B$ of the magnitude 0.5 T. The radius of path formed will be $\_\_\_\_$ cm.
A singly ionized magnesium atom ($A = 24$) ion is accelerated to kinetic energy 5 keV, and is projected perpendicularly into a magnetic field $B$ of the magnitude 0.5 T. The radius of path formed will be $\_\_\_\_$ cm.