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08/06/2020 12:52 pm

The kinetic energy of an electron in the second Bohr orbit of a hydrogen atom us [a_{0} is Bohr radius]

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08/06/2020 12:57 pm

**Correct option: (a)**

**Explanation:**

According to Bohr‘s model,

mvr = nh/2π .....(i)

On squaring both side of the equation (i),

Now, kinetic energy (KE) is given as,

Substituting 'r' in Eq. (i) give