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NEET 2003 (AIPMT) · Bohr Model: Orbits, Speed & Angular Momentum

Bohr Model: Orbits, Speed & Angular Momentum question from NEET 2003 (AIPMT)

Q120NEET 2003 · AIPMTEasy

Bohr Model: Orbits, Speed & Angular Momentum

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

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Answer: (d)

Magnitude $F = \frac{Ke^2}{r^2}$ ; $\hat{r}$ points from nucleus to electron.
The force on the electron is attractive, towards the nucleus, i.e. along $-\hat{r}$ .
So the answer is (d) $-K\frac{e^2}{r^2}\hat{r}$ .

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