CBSE 2026 · Region 2 · Set 3 · Q10 · 1 mark
According to Bohr model of hydrogen atom, the time period of an electron in its $\displaystyle \mathrm{n}^{\text {th }}$ orbit is proportional to
Official answer
From CBSE’s own marking scheme for this paper.
(C)
$\displaystyle \mathrm{n}^{3}$
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CBSE Class 12 Physics past-paper question from the 2026board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.