CBSE 2023 · Region 1 · Set 3 · Q6 · 1 mark
In an experiment, photons of energy $\displaystyle 7 \cdot 5 \mathrm{eV}$ are incident on a metal surface. Electrons emitted from the metal surface are stopped by an electrode at a potential of -$\displaystyle 4.5$ V w.r.t. the metal. The work function of the metal is :
Official answer
From CBSE’s own marking scheme for this paper.
(A)
$\displaystyle 3 \cdot 0 \mathrm{eV}$
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 2023board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.