CBSE 2023 · Region 4 · Set 1 · Q7 · 1 mark
Photons of energy $\displaystyle 3 \cdot 2 \mathrm{eV}$ are incident on a photosensitive surface. If the stopping potential for the emitted electrons is $\displaystyle 1.5$ V , the work function for the surface is :
Official answer
From CBSE’s own marking scheme for this paper.
(B)
1.$\displaystyle 7$ eV
Dual Nature of Radiation and MatterEinstein’s Photoelectric Equation: Energy Quantum of RadiationApplymcqeasy
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CBSE Class 12 Physics past-paper question from the 2023board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.