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RAJASTHAN PMT Rajasthan - PMT Solved Paper-2005

  • question_answer
    The slope of a graph drawn between threshold  frequency  and  stopping potential is:

    A)  e                                                           

    B)  h

    C)  \[\frac{h}{e}\]                 

    D)                         he

    Correct Answer: C

    Solution :

    Relation between threshold frequency \[({{V}_{0}})\] and potential \[{{V}_{0}}\] is\[e{{V}_{0}}=h\,{{v}_{0}}-\phi \] So,   \[{{V}_{0}}=\frac{h}{e}({{v}_{0}})-\frac{\phi }{e}\] Hence, slope of the graph is\[\frac{h}{e}\]


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