BCECE Medical BCECE Medical Solved Papers-2010

  • question_answer
    The numerical value of charge on either plate of capacitor C shown in figure

    A)  CE            

    B)  \[\frac{CE{{R}_{1}}}{{{R}_{1}}+r}\]

    C)  \[\frac{CE{{R}_{2}}}{{{R}_{2}}+r}\]

    D)  \[\frac{CE{{R}_{1}}}{{{R}_{2}}+r}\]

    Correct Answer: B

    Solution :

    \[{{R}_{total}}={{R}_{1}}+r\] (Since capacitor is a DC blocking element)                 \[V=i{{R}_{1}}\]                 \[V=\frac{E{{R}_{1}}}{{{R}_{1}}+r}\] \[\left( \because i=\frac{E}{{{R}_{1}}+r} \right)\] Since,    \[q=CV\] \[\Rightarrow \] \[q=\frac{CE{{R}_{1}}}{{{R}_{1}}+r}\]


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