nursing UP CNET BSc Nursing 2025 Mock Test Series Physics Atoms

The kinetic energy of the electron in an orbit of radius \(r\) in hydrogen atom is (\(e\) = electronic charge)

1
\(\frac{e^2}{r^2}\)
2
\(\frac{e^2}{2r}\)
3
\(\frac{e^2}{r}\)
4
\(\frac{e^2}{2r^2}\)
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