NEET Sample Paper NEET Sample Test Paper-1

  • question_answer \[7\mu f\]capacitor is charged by a 50V battery. Plow much electrostatic energy is stored by it?

    A)  \[1.7\times {{10}^{-8}}J\]              

    B)  \[13.6\times {{10}^{-9}}J\]

    C)  \[8.75\times {{10}^{-3}}J\]       

    D)  \[6.7\times {{10}^{-7}}J\]

    Correct Answer: C

    Solution :

    Here,    \[C=7\mu F=7\times {{10}^{-6}}F.\] \[V=50\] volt \[\therefore \] Energy stored \[=\frac{1}{2}C{{V}^{2}}\] \[=\frac{1}{2}\times 7\times {{10}^{-6}}\times {{(50)}^{2}}\] \[=8.75\times {{10}^{-3}}J\]            

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