CBSE 2025 · Region 1 · Set 3 · Q9 · 1 mark
In a photoelectric experiment with a material of work function $\displaystyle 2.1$ eV , the stopping potential is found to be $\displaystyle 2.5$ V . The maximum kinetic energy of ejected photoelectrons is
Official answer
From CBSE’s own marking scheme for this paper.
(C)
2.$\displaystyle 5$ 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 2025board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.