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JEE Main & Advanced Physics Electrostatics & Capacitance Question Bank Capacitance

  • question_answer
     A \[12pF\] capacitor is connected to a 50V battery. How much electrostatic energy is stored in the capacitor [AFMC 2000]

    A)            \[1.5\times {{10}^{-8}}\,J\]

    B)                                      \[2.5\times {{10}^{-7}}\,J\]

    C)            \[3.5\times {{10}^{-5}}\,J\]

    D)                                      \[4.5\times {{10}^{-2}}\,J\]

    Correct Answer: A

    Solution :

               \[U=\frac{1}{2}C{{V}^{2}}=\frac{1}{2}\times 12\times {{10}^{-12}}\times {{(50)}^{2}}\]\[=1.5\times {{10}^{-8}}J\]


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