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Test Index
Class 12 NEET Physics Atoms and Nuclei Part 1
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© examsnet.com
Question : 12
Total: 100
The total energy of an electron in the first excited state of hydrogen atom is about
−
3.4
e
V
. Its kinetic energy in this state is
(2005)
3.4
e
V
6.8
e
V
−
3.4
e
V
-6.8 eV.
Validate
Solution:
K
.
E
.
=
|
1
2
P
.
E
.
|
But P.E. is negative.
∴
Total energy
=
|
1
2
P
.
E
.
|
−
P.E.
=
−
P
.
E
.
2
=
−
3.4
eV.
∴
K
.
E
.
=
+
3.4
e
V
© examsnet.com
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