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JAMIA MILLIA ISLAMIA Jamia Millia Islamia Solved Paper-2009

  • question_answer
        Two photons of energy 2.5 eV each are incident on a metal plate whose work function is 4.0 eV, then the number of electrons emitted from the metal surface will be 

    A)  one                                      

    B)  two     

    C)  more than two                

    D)  None of these

    Correct Answer: C

    Solution :

                    Energy of falling photon is less than threshold energy of metal so, photoelectric effect does not take place.


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