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NEET Sample Paper NEET Sample Test Paper-10

  • question_answer
    A diode used in the circuit shown has constant voltage drop of \[0.5V\]at all currents and a maximum power rating of \[100mW\]. What should be the value of the resistor R, connected in series with the diode to obtain in maximum current?            

    A)  \[5\Omega \]                          

    B)  \[5.6\Omega \]

    C)  \[6.76\Omega \]                     

    D)  \[20\Omega \]

    Correct Answer: A

    Solution :

    Diode current \[=\frac{P}{V}=\frac{100\times {{10}^{-3}}}{0.5}=0.2A\] Potential differences across             \[R=1.5-0.51V\] As,     \[IR=V\] \[\Rightarrow \]    \[R=\frac{1}{0.2}=5\Omega \]


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