Physics · 2025
JEE Main · 22 January 2025, Shift 1 · Q43
The work functions of cesium (Cs) and lithium (Li) metals are 1.9 eV and 2.5 eV, respectively. If we incident a light of wavelength 550 nm on these…
The work functions of cesium (Cs) and lithium (Li) metals are $\displaystyle 1.9$ eV and $\displaystyle 2.5$ eV, respectively. If we incident a light of wavelength $\displaystyle 550$ nm on these two metal surfaces, then photo-electric effect is possible for the case of
Official answer
From NTA’s final answer key for this paper.
(1)
Cs only
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JEE Main 2025 Physics question, with the answer from NTA’s final answer key. Where our answers come from.