Question
Using Bohr model, calculate the electric current created by the electron when the $H-$atom is in the ground state.

Answer

$v =$ velocity of electron$, a_0 =$ Bohr radius.
Number of revolutions per unit time $=\frac{2\pi\text{a}_0}{\text{V}_0}$
So, current $=\text{i}=\frac{2\pi\text{a}_0}{\text{v}}\text{e}.$

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