A proton, a deuteron and an `alpha`- particle having the same kinetic energy are moving in circular trajectors in a constant magnetic field. If `r_p, r_d` and `r_(alpha)` denote respectively the radii of the trajectories of these particles then

A proton, a deuteron and an alpha - particle having the same kinetic energy are moving in circular trajectories in a constant magnetic field. If r_p, r_d and r_alpha denote respectively the radii of the trajectories of these particles, then

A proton , a deutron and alpha ) - particle having the same kinetic energy are moving in circular trajectories in a constant magnetic field . If r_(p), r_(d) , and r_(alpha) denote respectively the radii of the trajectories of these particles , then

A proton deutron and an alpha -particle having the same K.E. are moving in circular trajectories in a constant magnetic field. If r_(p), r_(d) and r_(a) denote respectively radius of the trajectories of these particles then