Structure of Atom - Result Question 16
####16. In hydrogen atom, energy of first excited state is
[2002]
(a)
(b)
(c)
(d)
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Solution:
- (a) Suppose the nucleus of hydrogen atom have charge of one proton
. The electron revolves in an orbit of radius around it. Therefore the centripetal force is supplied by electrostatic force of attraction between the electron and nucleus i.e.
or
or
now total energy
in first excited state
For Bohr orbit, kinetic energy