The kinetic energy of the electron in an orbit of radius `r` in hydrogen atom is (`e =` electronic charge)A. `(e^(2))/(r^(2))`B. `(e^(2))/(2r)`C. `(e^(2))/(r )`D. `(e^(2))/(2r^(2))`

The kinetic energy of the electron in an orbit of radius `r` in hydrog

1.	The kinetic energy of the electron in an orbit of radius `r` in hydrogen atom is (`e =` electronic charge)A. `(e^(2))/(r^(2))`B. `(e^(2))/(2r)`C. `(e^(2))/(r )`D. `(e^(2))/(2r^(2))`
Answer» Correct Answer - B Potential energy of electron in nth orbit of radius `r` in `H`-atom `U = - (e^(2))/(r )` (in `CGS`) `:. K.E. = (1)/(2) \|P.E.\| rArr K = (e^(2))/(2r)`

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The kinetic energy of the electron in an orbit of radius `r` in hydrogen atom is (`e =` electronic charge)A. `(e^(2))/(r^(2))`B. `(e^(2))/(2r)`C. `(e^(2))/(r )`D. `(e^(2))/(2r^(2))`

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