CBSE 2024 · Region 1 · Set 1 · Q11 · 1 mark
Two beams, A and B whose photon energies are $\displaystyle 3 \cdot 3 \mathrm{eV}$ and $\displaystyle 11 \cdot 3 \mathrm{eV}$ respectively, illuminate a metallic surface (work function $\displaystyle 2 \cdot 3 \mathrm{eV}$ ) successively. The ratio of maximum speed of electrons emitted due to beam A to that due to beam B is :
Official answer
From CBSE’s own marking scheme for this paper.
(C)
$\displaystyle \frac{1}{3}$
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 2024board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.