Q. The Kinetic energy of the electron in an orbit of radius $r$ in hydrogen atom is ($e =$electronic charge)
A) $\frac{e^{2}}{r^{2}}$
B) $\frac{e^{2}}{{2r}^{\ }}$
C) $\frac{e^{2}}{r^{\ }}$
D) $\frac{e^{2}}{{2r}^{2}}$
Explanation
(b) $KE = \frac{1}{2}\frac{e^{2}}{r}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.