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NEET Sample Paper NEET Sample Test Paper-65

  • question_answer
    The voltage V and current I graph for a conductor at two different temperatures \[{{T}_{1}}\] and \[{{T}_{2}}\] are shown in the figure. The relation between\[{{T}_{1}}\,and\,{{T}_{2}}\] is

    A) \[{{T}_{1}}\,\,>\,\,{{T}_{2}}\]            

    B) \[{{T}_{1}}\,\,\approx \,\,{{T}_{2}}\]

    C) \[{{T}_{1}}\,\,=\,\,{{T}_{2}}\]            

    D) \[{{T}_{1}}\,\,<\,\,{{T}_{2}}\]

    Correct Answer: A

    Solution :

    Slope of the \[V-i\] curve at any point equal to resistance at that point. From the curve slope for \[{{T}_{1}}>\,\,slope\,\,for\,\,{{T}_{2}}\] \[=\,\,\,{{R}_{{{T}_{1}}}}\,\,>\,\,{{R}_{{{T}_{2}}}}\]. Also at higher temperature resistance will be higher \[{{T}_{1}}\,\,>\,\,{{T}_{2}}\].


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