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Byju's Answer
Standard XII
Physics
Drawbacks of Rutherford's Model
What will be ...
Question
What will be the angular momentum of an electron, in a hydrogen atom, if its energy is
1.5
eV
?
A
1.05
×
10
−
34
J-s
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B
2.1
×
10
−
34
J-s
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C
3.16
×
10
−
34
J-s
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D
−
2.1
×
10
−
34
J-s
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Solution
The correct option is
C
3.16
×
10
−
34
J-s
Energy of electron in H-atom
E
n
=
−
13.6
n
2
(
in eV
)
⇒
−
1.5
=
−
13.6
n
2
⇒
n
=
3
Now, angular momentum is given by,
L
=
n
h
2
π
=
3
×
6.63
×
10
−
34
2
×
3.14
=
3.16
×
10
−
34
J-s
Hence,
(
C
)
is the correct answer.
Why this Question?
This question is based on concept of angular momentum.
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