A charged particle is accelerated through a potential difference of 12 kV and acquires a speed of `1.0 xx 10^6 m//s` It is then injected perpendicularly into a magnetic field of strength 0.2 at Then the radius of the circle described by it.

Options

A. 12 cm
B. 8 cm
C. 24 cm
D. 4 cm

Answer

A