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A charge particle moves along circular p...

A charge particle moves along circular path in a uniform magnetic field in a cyclotron. The kinetic energy of the charge particle increases to 4 times its initial value. What will be the ratio of new radius to the original radius of circular path of the charge particle :

A

`1:1`

B

`1:2`

C

`2:1`

D

`1:4`

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