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If an electron is moving in the nth orbit of the Hydrogen atom, then its velocity vn for the nth orbit is given as:

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a
vn∝1n
b
vn∝n2
c
vn∝1n2
d
vn∝n

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detailed solution

Correct option is A

In Bohr’s postulates  mvr=nh2πAnd radius of Bohr orbit   r ∝ n2Thus, velocity of electron  v ∝ 1n, where n is orbit number

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