Q 1184667557.     The kinetic energy of an electron in the second Bohr orbit of a hydrogen atom is [`a_0` is Bohr radius] ?

JEE 2012
A

`(h^2/(4pi^2ma_o^2))`

B

` (h^2/(16pi^2ma_o^2))`

C

`(h^2/(32pi^2ma_o^2))`

D

`(h^2/(64pi^2ma_o^2))`

HINT

Use `mvr=(nh)/(2pi)` where `r=(a_o*n^2)/Z`

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