Q. Minimum energy required to takeout the only one electron from ground state of $He^{+}$ is
A) $13.6\ eV$
B) $54.4\ eV$
C) $27.2\ eV$
D) $6.8\ eV$
Explanation
(b) $E_{n} = - \frac{13.6z^{2}}{n^{2}}eV \Rightarrow E_{1} = - \frac{13.6 \times (2)^{2}}{(1)^{2}} = - 54.4\ eV$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.