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JEE Main & Advanced Physics Semiconducting Devices Question Bank Graphical Questions

  • question_answer
    The ratio of thermionic currents (I/I0) for a metal when the temperature is slowly increased \[{{T}_{0}}\] to \[T\] as shown in figure. (I and I0 are currents at T and respectively). Then which one is correct?                                               [Orissa JEE 2002]

    A)            A    

    B)            B

    C)            C    

    D)            D

    Correct Answer: A

    Solution :

                       \[i\propto {{T}^{2}}\] Þ \[\frac{i}{{{i}_{0}}}={{\left( \frac{T}{{{T}_{0}}} \right)}^{2}}\] This is the equation of a parabola.


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