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A proton and a deuteron with the same in...

A proton and a deuteron with the same initial kinetic energy enter a magnetic field in a direction perpendicular to the direction of the field.The ratio of the radii of the circular trajectories described by them is

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Mass of proton `=1 u`, mass of deuteron `=2u`
Charge of proton `=e`, charge of deuteron `=e`
`(r_(p))/(r_(d))=(m_(p))/(m_(d))=1/2`
Trajectories of path is circular as given below :
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