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A deuteron of kinetic energy 50 keV is d...

A deuteron of kinetic energy 50 keV is desvribing a circular orbit of radius 0.5 meter in a plane perpendicular to magnetic field `vecB`. The kinetic energy of the proton that describes a circular orbit of radius 0.5 meter in the same plane with the same` vecB `is

A

25 keV

B

50 keV

C

200 keV

D

100 keV

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