A charged particle moves in a circular path of radius 2.4 cm in a uniform magnetic field.
The direction of the magnetic field is perpendicular to the plane of the paper.
The particle has mass mmm, charge +q+q+q and speed vvv.
Another particle of mass 2m, charge +3q+3q+3q and speed 2v 2v\,2v moves in a circular path of radius R R\,R in the same magnetic field.
What is the value of RRR?
1.6 cm1.6\text{ cm}1.6 cm
2.4 cm2.4\text{ cm}2.4 cm
3.2 cm3.2\text{ cm}3.2 cm
4.8 cm4.8\text{ cm}4.8 cm
