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Byju's Answer
Standard XI
Physics
Characteristics of Bohr's Atomic Model
The kinetic e...
Question
The kinetic energy of the electron in an orbit of radius
r
in hydrogen atom is (
e = electronic charge)
A
e
2
r
2
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B
e
2
2
r
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C
e
2
r
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D
e
2
2
r
2
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Solution
The correct option is
B
e
2
2
r
Potential energy of electron in
n
t
h
orbit of radius r in H - atom
U
=
−
e
2
r
(in CGS)
∵
K
.
E
=
1
2
|
P
.
E
|
⇒
K
=
e
2
2
r
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