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JIPMER 2013
Exam
JIPMER
Year
2013
Subject
Physics
Chapter
Dual Nature of Matter

JIPMER 2013 · Physics · Dual Nature of Matter

Minimum excitation potential of Bohr's first orbit in hydrogen atom...

Minimum excitation potential of Bohr's first orbit in hydrogen atom is

Options

  1. A3.6 V
  2. B10.2 V
  3. C13.6 V
  4. D3.4 V

Correct answer

B. 10.2 V

Step-by-step solution

From the relation ΔE=13.6eV−13.6eVn2=13.6eV−13.6eV(2)2=10.2eV\begin{aligned} \Delta E & =13.6 \mathrm{eV}-\frac{13.6 \mathrm{eV}}{n^2} \\ & =13.6 \mathrm{eV}-\frac{13.6 \mathrm{eV}}{(2)^2}=10.2 \mathrm{eV}\end{aligned} Therefore, excitation potential =10.2eeV=\frac{10.2}{e} \mathrm{eV}=10.2  V\mathrm{~V}
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