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NEET Sample Paper NEET Sample Test Paper-8

  • question_answer
      Four condensers each of capacity \[4\mu \] fare connected as shown in figure, with \[{{V}_{P}}-{{V}_{Q}}=15V.\] The energy stored in the system is:

    A)  \[2400erg\]          

    B)  \[1800erg\]

    C)  \[3600erg\]                 

    D)  \[5400erg\]

    Correct Answer: B

    Solution :

    Total capacitance of given system \[{{C}_{eq}}=\frac{8}{5}\mu f\] \[U=\frac{1}{2}{{C}_{eq}}{{V}^{2}}\] \[=\frac{1}{2}\times \frac{8}{5}\times {{10}^{-6}}\times 225\] \[=180\times {{10}^{-6}}J\] \[-180\times {{10}^{-6}}\times {{10}^{-7}}erg=1800erg\]


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