question_answer

A deuteron of kinetic energy 50 ke V is describing a circular orbit of radius 0.5 metre in a plane perpendicular to the magnetic field B. The kinetic energy of the proton that describes a circular orbit of radius 0.5 metre in the same plane with the same B is

A) \[25\,ke\,V\]      

B) \[50\,ke\,V\]

C) \[200\,ke\,V\]     

D) \[100\,ke\,V\]