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JEE Main & Advanced Physics Electrostatics & Capacitance Question Bank Capacitance

  • question_answer
    A \[700\,pF\] capacitor is charged by a \[50V\] battery. The electrostatic energy stored by it is                    [MH CET 2000]

    A)            \[17.0\times {{10}^{-8}}\,J\]

    B)                                      \[13.6\times {{10}^{-9}}\,J\]

    C)            \[9.5\times {{10}^{-9}}\,J\]

    D)                                      \[8.7\times {{10}^{-7}}\,J\]

    Correct Answer: D

    Solution :

               \[U=\frac{1}{2}C{{V}^{2}}=\frac{1}{2}\times 700\times {{10}^{-12}}{{(50)}^{2}}\]\[=8.7\times {{10}^{-7}}J\]


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