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The kinetic energy of an electron in the...

The kinetic energy of an electron in the second Bohr orbit of a hydrogen atom is [`a_0` is Bohr radius] :

A

`frac(h^2)(4 pi^2ma_0^2)`

B

`frac(h^2)(16 pi^2ma_0^2)`

C

`frac(h^2)(32 pi^2ma_0^2)`

D

`frac(h^2)(64 pi^2ma_0^2)`

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