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NEET Sample Paper NEET Sample Test Paper-57

  • question_answer
    When the voltage drop across a p-n junction diode is increased from 0.65V to 0.70V, the change in the diode current is 5mA. The dynamic resistance of the diode is:

    A) \[20\Omega \]                

    B) \[50\Omega \]

    C) \[10\Omega \]                            

    D) \[80\Omega \]

    Correct Answer: C

    Solution :

    [c] Voltage change \[\Delta V=0.70-0.65\]                                                 \[=0.05V\] Change in diode current \[\Delta I=\text{ }5\times {{10}^{-3}}\text{ }A\] Dynamic resistance \[R=\frac{0.05}{5\times {{10}^{-3}}}\] \[R=10\Omega \]


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