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A proton, a deutron and an alpha particl...

A proton, a deutron and an alpha particle, after being accelerated through the same potential difference enter a region of uniform magnetic field `vecB`, in a direction perpendicular to `vecB`. Find the ratio of their kinetic energies. If the radius of proton's circular path is `7cm`, what will be the radii of the paths of deutron and alpha particle?

A

`2:1:1`

B

`1:1:2`

C

`2:2:1`

D

`2:1:2`

Text Solution

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The correct Answer is:
D
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