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J & K CET Engineering J and K - CET Engineering Solved Paper-2007

  • question_answer
    The diode used in the circuit shown in the figure has a constant voltage drop of \[0.5\text{ }V\]at all currents and a maximum power rating of 100 milli-watt. What should be the value of the resistance R, connected in series with the diode, for obtaining maximum current?

    A)  \[1.5\,\Omega \]

    B)  \[5\,\Omega \]

    C)  \[6.67\,\,\Omega \]

    D)  \[200\]

    Correct Answer: B

    Solution :

    \[R=\frac{Voltage\,drop}{Current}\] \[\therefore \] Current in circuit, \[I=\frac{P}{V}\] \[=\frac{100\times {{10}^{-3}}}{0.5}=0.2A\] \[R=\frac{1}{0.2}=5\Omega \]


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