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BVP Medical BVP Medical Solved Paper-2006

  • question_answer
    From the graph between current I and voltage V shown in figure, identify the portion corresponding to negative resistance:

    A)  DE                                         

    B)  CD

    C)  BC                                         

    D)  AB

    Correct Answer: B

    Solution :

                     Key Idea: Negative resistance means the resistance which decreases when temperature or voltage increases. From Ohms law, resistance \[R=\frac{\Delta V}{\Delta I}\] Resistance is said to be negative, if an increasing voltage or temperature, current decreases. In V-I  graph, for portion CD of graph, the current decreases with increasing voltage. Thus, portion CD corresponds to negative resistance.


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