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A proton, an alpha particle both enter a...

A proton, an alpha particle both enter a region of uniform magneitc field B, moving at right angles to the field B. If the radius of circular orbits for both the particles is equal and the kinetic energy acquired by proton is 1 MeV, the energy acquired by alpha particle will be :

A

1 MeV

B

2 MeV

C

0.5 MeV

D

1.5 MeV

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The correct Answer is:
A
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