CBSE 2024 · Region 3 · Set 1 · Q11 · 1 mark
An electron makes a transition from $\displaystyle \mathrm{n}=2$ level to $\displaystyle \mathrm{n}=1$ level in the Bohr model of a hydrogen atom. Its period of revolution :
Official answer
From CBSE’s own marking scheme for this paper.
(B)
decreases by $\displaystyle 87 \cdot 5 \%$
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CBSE Class 12 Physics past-paper question from the 2024board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.