Magnetic field due to currentMedium
Question
A proton and an alpha particle are separately projected in a region where a uniform magnetic field exists. The initial velocities are perpendicular to the direction of magnetic field. If both the particles move along circles of equal radii, the ratio of momentum of proton to alpha particle 
is :-
is :-Options
A.1
B.1 / 2
C.2
D.1 / 4
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