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  4. The speed of an electron in the orbit of the hydrogen atom in the ground state is (c is speed of light)

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Q. The speed of an electron in the orbit of the hydrogen atom in the ground state is (c is speed of light)

NTA AbhyasNTA Abhyas 2022

Solution:

$V=9\times 10^{9}\times \frac{2 \pi e^{2}}{n h}=2.18\times 10^{6} \, $ m/s
Or $V=\frac{2.18 \times 10^{6}}{3 \times 10^{8}}c=\frac{c}{137}$