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VIT Engineering VIT Engineering Solved Paper-2008

  • question_answer
    A Zener diode has a contact potential of 1 V in the absence of biasing. It undergoes Zener breakdown for an electric field of \[{{10}^{6}}\,\,V/m\] at the depletion region of \[p-n\] junction. If the width of the depletion region is 2.5 \[\mu \]m, what should be the reverse biased potential for the Zener breakdown to occur?

    A)  3.5 V          

    B)  2.5 V

    C)  1.5 V          

    D)  0.5 V  

    Correct Answer: B

    Solution :

    Reverse biased potential for the zener breakdown \[{{V}_{r}}=Ed\] \[={{10}^{6}}\times 2.5\times {{10}^{-6}}\] \[=2.5volt\]


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