An electron is moving round the nucleus of a hydrogen atom in a circular orbit of radius r. The coulomb force \[\vec{F}\] between the two is: [AIPMT 2003]

\[k\frac{{{e}^{2}}}{{{r}^{3}}}\vec{r}\]

\[-k\,\frac{{{e}^{2}}}{{{r}^{3}}}\vec{r}\]

\[k\frac{{{e}^{2}}}{{{r}^{2}}}\hat{r}\]

\[-k\frac{{{e}^{2}}}{{{r}^{3}}}\hat{r}\]

An electron is moving round the nucleus of a hydrogen atom in a circul

1.	An electron is moving round the nucleus of a hydrogen atom in a circular orbit of radius r. The coulomb force \[\vec{F}\] between the two is: [AIPMT 2003]
A.	\[k\frac{{{e}^{2}}}{{{r}^{3}}}\vec{r}\]
B.	\[-k\,\frac{{{e}^{2}}}{{{r}^{3}}}\vec{r}\]
C.	\[k\frac{{{e}^{2}}}{{{r}^{2}}}\hat{r}\]
D.	\[-k\frac{{{e}^{2}}}{{{r}^{3}}}\hat{r}\]
Answer» E.