JEE Main 2022 · 27 Jun · Shift 2, Physics question 58

A deuteron and a proton moving with equal kinetic energy enter into to a uniform magnetic field at right angle to the field. If $r_d$ and $r_p$ are the radii of their circular paths respectively, then the ratio $\dfrac{r_d}{r_p}$ will be $\sqrt x:1$ where $x$ is ______.