Physics · 2019
JEE Main · 10 April 2019, Shift 1 · Q25
In a photoelectric effect experiment the threshold wavelength of light is 380 nm. If the wavelength of incident light is 260 nm, the maximum kinetic…
In a photoelectric effect experiment the threshold wavelength of light is $\displaystyle 380$ nm. If the wavelength of incident light is $\displaystyle 260$ nm, the maximum kinetic energy of emitted electrons will be :Given $\displaystyle \mathrm{E}($ in eV$\displaystyle )=\frac{1237}{\lambda(\text { in } \mathrm{nm})}$
Official answer
(4)
1.$\displaystyle 5$ eV
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JEE Main 2019 Physics question, with the answer from NTA’s final answer key. Where our answers come from.