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EAMCET Medical EAMCET Medical Solved Paper-2010

  • question_answer
    The current- voltage graph for a given metallic wire at two different temperatures t) and \[{{T}_{1}}\]and \[{{T}_{2}}\]is shown in the figure. The temperatures \[{{T}_{1}}\]and \[{{T}_{2}}\] are related as

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

    B)                  \[{{T}_{1}}<{{T}_{2}}\]

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

    D)                  \[{{T}_{1}}>2{{T}_{2}}\]

    Correct Answer: B

    Solution :

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


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