The momentum of an electron revolving in $\mathrm{n}^{\text {th }}$ orbit is given by : (Symbols have their usual meanings)

Question

The momentum of an electron revolving in $\mathrm{n}^{\text {th }}$ orbit is given by :

(Symbols have their usual meanings)

$\frac{\mathrm{nh}}{2 \pi \mathrm{r}}$

$$ \frac{n h}{2 r} $$

$$ \frac{\mathrm{nh}}{2 \pi} $$

$\frac{2 \pi r}{\mathrm{nh}}$

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