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AMU Medical AMU Solved Paper-2014

  • question_answer
    The work functions of four materials \[{{M}_{1}},{{M}_{2}},{{M}_{3}}\] and \[{{M}_{4}}\]  are 1.9 eV, 2.5 eV, 3.6 eV, and 4.2 eV, respectively. Which of these material is (are) useful in a photocell to detect visible light?

    A)  \[{{M}_{1}}\]only                           

    B)  \[{{M}_{1}}\] and \[{{M}_{2}}\]

    C)  \[{{M}_{3}}\] only                          

    D)  All of these

    Correct Answer: B

    Solution :

                     The material are useful in a photocell to detect visible light \[{{M}_{1}}\] and \[{{M}_{2}}\].


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