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An alpha particle and a proton having sa...

An `alpha` particle and a proton having same momentum enter into a region of uniform magnetic field and move in circular paths. The ratio of the radii of curvature of their paths, `(R_(alpha))/(R_(p))` in the field is

A

`(1)/(2)`

B

`(1)/(4)`

C

1

D

4

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The correct Answer is:
A
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