An electron is in an excited state in hydrogen-like atom. It has a ...

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An electron is in an excited state in hydrogen-like atom. It has a total energy of \( -3.4 \mathrm{eV} \). If the kinetic energy of the electron is \( E \) and its de-Broglie wavelength is \( \lambda \), then
\( \mathrm{P} \)
(A) \( \mathrm{E}=6.8 \mathrm{eV}, \lambda=6.6 \times 10^{-10} \mathrm{~m} \)
(B) \( \mathrm{E}=3.4 \mathrm{eV}, \lambda=6.6 \times 10^{-10} \mathrm{~m} \)
(C) \( \mathrm{E}=3.4 \mathrm{eV}, \lambda=6.6 \times 10^{-11} \mathrm{~m} \)
(D) \( \mathrm{E}=6.8 \mathrm{eV}, \lambda=6.6 \times 10^{-11} \mathrm{~m} \)
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