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An electron revolve round the nucleous w...

An electron revolve round the nucleous with the radius of the circular orbit is 'r' . To double the kinetic energy of the electron its orbital radius will be

A

`sqrt(2)r`

B

`-sqrt(2)r`

C

`sqrt(3)r`

D

`-sqrt(3)r`

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The correct Answer is:
A
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