Same kinetic energy of proton, deuterium and alpha particle.Find the comparison between their radii.

If E_1, E_2 and E_3 represent respectively the kinetic energies of an electron, an alpha - particle and a proton each having same de-Broglie wavelength, then

If E_(1),E_(2) and E_(3) represent respectively , the kinetic energies of an elctron an alpha particle and a proton each having same de Broglie wavelength , then

If E_(1) , E_(2) "and" E_(3) represent respectively the kinetic energies of an electron , an alpha particle and a proton each having same de Broglie wavelength then :

Proton , deuton and alpha particle of same kinetic energy are moving in circular trajectories in a constant magnetic field. The radii of proton , deuteron and alpha particle are respectively r_(p), r_(d) and r_(alpha) . Which one of the following relation is correct?

The neutron, proton, electron and alpha particle are moving with equal kinetic energies. How can the particles be arranged in the increaseing order of their velocities?

A proton (p) , alpha -particle and deuteron (D) are moving in circular paths with same kinetic energies in the same magnetic field.Find the ratio of their and time periods.(neglect interaction between particles)