# NEET Physics Atoms Questions Solved

The kinetic energy of the electron in an orbit of radius r in hydrogen atom is (e = electronic charge)

(1) $\frac{{e}^{2}}{{r}^{2}}$        (2) $\frac{{e}^{2}}{2r}$         (3) $\frac{{e}^{2}}{r}$            (4) $\frac{{e}^{2}}{2{r}^{2}}$