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Physics · 2026 · 1 mark
CBSE 2026 · Region 2 · Set 3 · Q9
In Bohr model of hydrogen atom, an electron is moving in an orbit, with total energy -3.4 eV. Its angular momentum will be
In Bohr model of hydrogen atom, an electron is moving in an orbit, with total energy -$\displaystyle 3.4$ eV. Its angular momentum will be
Official answer
(D)
$\displaystyle 2.1 \times 10^{-34} \mathrm{~J} \mathrm{~s}$
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CBSE Class 12 Physics past-paper question from the 2026 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.