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WB JEE Medical WB JEE Medical Solved Paper-2009

  • question_answer
    A junction diode has a resistance of \[25\,\Omega \] when forward biased and \[2500\,\,\Omega \]when reverse biased. The current in the diode, for the arrangement shown will be

    A)  \[\frac{1}{15}A\]                            

    B)  \[\frac{1}{7}A\]

    C)  \[\frac{1}{25}A\]                            

    D)  \[\frac{1}{180}A\]

    Correct Answer: B

    Solution :

                     The junction diode is forward biased. Therefore, the effective resistance \[=25+10=35\,\Omega \] \[\therefore \] Current in diode \[I=\frac{5V}{35\,\Omega }=\frac{1}{7}A\]


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