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JEE Main & Advanced Physics Photo Electric Effect, X- Rays & Matter Waves Question Bank Graphical Questions

  • question_answer
      The stopping potential as a function of the frequency of the incident radiation is plotted for two different photoelectric surfaces A and B. The graphs show that work function of A is                                                      [DPMT 1992]

    A)            Greater than that of B     

    B)            Smaller than that of B

    C)            Equal to that of B               

    D)            No inference can be drawn about their work functions from the given graphs

    Correct Answer: B

    Solution :

               From the given graph it is clear that if we extend the given graph for A and B, intercept of the line A on V axis will be smaller as compared to line B means work function of A is smaller than that of B.


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