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JEE Main & Advanced Physics Electrostatics & Capacitance Question Bank Capacitance

  • question_answer
    A capacitor of capacity \[C\] has charge \[Q\] and stored energy is \[W\]. If the charge is increased to \[2Q\], the stored energy will be                                                [MP PET 1990]

    A)                    \[2W\]

    B)                                      \[W/2\]

    C)                    \[4W\]                            

    D)            \[W/4\]

    Correct Answer: C

    Solution :

               \[W=\frac{{{Q}^{2}}}{2C}\] Þ \[W'=4W\]


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