Target Exam

CUET

Subject

Physics

Chapter

Atoms

Question:

The potential energy of an electron in the first excited state of hydrogen atom is -6.8 eV. The kinetic energy of the electron in it ground state will be:

Options:

6.8 eV

13.6 eV

-13.6 eV

+27.6 eV

Correct Answer:

13.6 eV

Explanation:

The correct answer is Option (2) → 13.6 eV

The energy of Bohr hydrogen atom model is -

$E=\frac{13.6}{n^2}eV$

where,

$n=1$ (for ground state)

$E=13.6eV$