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JEE Main & Advanced Physics Semiconducting Devices Question Bank Graphical Questions

  • question_answer
    The i-V characteristic of a P-N junction diode is shown below. The approximate dynamic resistance of the P-N junction when a forward bias of 2volt is applied

    A)            1 W

    B)            0.25 W

    C)            0.5 W

    D)            5 W

    Correct Answer: B

    Solution :

               The current at 2V is 400 mA and at 2.1 V it is 800 mA. The dynamic resistance in this region \[R=\frac{\Delta V}{\Delta i}=\frac{(2.1-2)}{(800-400)\times {{10}^{-3}}}=\frac{1}{4}=0.25\Omega \]


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