CBSE 2026 · Region 4 · Set 3 · Q12 · 1 mark
Photons of frequency $\displaystyle v$ are incident on the surfaces of two metals A and B of threshold frequencies $\displaystyle \frac{v}{2}$ and $\displaystyle \frac{v}{3}$. The ratio of maximum kinetic energy of electrons emitted from metal A to that from metal B is :
Official answer
From CBSE’s own marking scheme for this paper.
(B)
$\displaystyle \frac{3}{4}$
Dual Nature of Radiation and MatterEinstein’s Photoelectric Equation: Energy Quantum of RadiationApplymcqmedium
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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.