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Question

In a hydrogen atom,the binding energy of the electron in the nth state is En, then the frequency of revolution of the electron in the nth orbits is

A
2En/nh
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B
2E/nh
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C
E/nh
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D
En/nh
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Solution

The correct option is A 2En/nh
By Bhor's theory
mvr=nh2π2nr=nhmv ....... (1)$
Also, mv22= Binding energy =En .......... (2)
We know.
v=wrv=2πfR ........... (3)
From (1),(2) and (3), we get
f=v(nhmv)=mv2nh=26nnh
Option =A is correct

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