CBSE 2025 · Region 2 · Set 1 · Q11 · 1 mark
The energy of an electron in a hydrogen atom in ground state is -$\displaystyle 13.6$ eV. Its energy in an orbit corresponding to quantum number n is -$\displaystyle 0.544$ eV. The value of $\displaystyle n$ is
Official answer
From CBSE’s own marking scheme for this paper.
(D)
$\displaystyle 5$
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CBSE Class 12 Physics past-paper question from the 2025board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.