JEE Main & Advanced Physics Electrostatics & Capacitance Question Bank Capacitance

  • question_answer
    A capacitor is used to store 24 watt hour of energy at 1200 volt. What should be the capacitance of the capacitor [Kerala (Engg.) 2001]

    A)            \[120\,m\,F\]

    B)                                      \[120\,\mu \,F\]

    C)            \[24\,\mu \,F\]                   

    D)            \[24\,m\,F\]

    Correct Answer: A

    Solution :

               \[U=\frac{1}{2}C{{V}^{2}}\]so\[24\times 60\times 60=\frac{1}{2}C{{(1200)}^{2}}\]Þ C=120 mF


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