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Solution


Q.

UV light of 4.13 eV is incident on a photosensitive metal surface having work function 3.13 eV. The maximum kinetic energy of ejected photoelectrons will be      [2024]
1 4.13 eV  
2 1 eV  
3 3.13 eV  
4 7.26 eV  

Ans.

(2)           

               As we know that

                (K.E.)max=Ephoton- work function =hν-ϕ 

                 (K.E.)max=4.13eV-3.13eV

                Max K.E.=1eV