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The kinetic energy of an electron in the second Bohr orbit of a hydrogen atom us [a0 is Bohr radius]  

  

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The kinetic energy of an electron in the second Bohr orbit of a hydrogen atom us [a0 is Bohr radius]

2s.png

1 Answer
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Correct option: (a)

Explanation:

According to Bohr‘s model,

mvr = nh/2π   .....(i)

On squaring both side of the equation (i),

2s.png

Now, kinetic energy (KE) is given as,

2s.png

Substituting 'r' in Eq. (i) give

2s.png

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