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BCECE Engineering BCECE Engineering Solved Paper-2014

  • question_answer
    In a semiconductor diode, the forward voltage is changed from 0.5 V to 0.7V, then the   forward current changes by 1mA. The forward resistance of the diode junction is

    A) 100 \[\Omega \]              

    B) 50 \[\Omega \]

    C) 200 \[\Omega \]        

    D) 250 \[\Omega \]

    Correct Answer: C

    Solution :

    \[R=\frac{\Delta V}{\Delta l}\] \[\Delta V=0.7-0.5V\] \[\Delta l=1\times {{10}^{-3}}A\] \[\therefore \]  \[R=\frac{0.7-0.5}{1\times {{10}^{-3}}}=200\Omega \]                


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