A tritium nucleus (3H+^3\text{H}^+3H+, mass 3 u3\text{ u}3 u, charge +1e+1e+1e) and a helium-3 nucleus (3He2+^3\text{He}^{2+}3He2+, mass 3 u3\text{ u}3 u, charge +2e+2e+2e) are both accelerated from rest through the same potential difference VVV. They then enter a uniform magnetic field of flux density B B\,B directed perpendicular to their velocity, as shown in the diagram.
What is the ratio of the radius of the circular path of the tritium nucleus to that of the helium-3 nucleus, rTrHe\displaystyle \frac{r_{\text{T}}}{r_{\text{He}}}rHerT?
0.500.500.50
0.710.710.71
1.411.411.41
2.002.002.00