AIIMS AIIMS Solved Paper-2014

  • question_answer
    The current-voltage graph for a device is shown in figure. The resistance is negative in region.

    A) AS                                          

    B) BC

    C) ABC                                       

    D) None of these

    Correct Answer: A

    Solution :

                    \[R=\frac{\Delta V}{\Delta i}\]is negative, when current decreases with increase of potential difference. This is exhibited by part AB.


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