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JEE Main & Advanced Physics Electrostatics & Capacitance Question Bank Capacitance

  • question_answer
    The energy of a charged capacitor is given by the expression (\[q\]= charge on the conductor and C = its capacity) [MP PMT 1989]

    A)                                                      \[\frac{{{q}^{2}}}{2C}\]    

    B)            \[\frac{{{q}^{2}}}{C}\]

    C)                    \[2qC\]

    D)                                      \[\frac{q}{2{{C}^{2}}}\]

    Correct Answer: A

    Solution :

               \[q=CV\] and \[U=\frac{1}{2}C{{V}^{2}}=\frac{{{q}^{2}}}{2C}\]


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