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KVPY Sample Paper KVPY Stream-SX Model Paper-6

  • question_answer
    A parallel plate capacitor with plates of area \[1\,{{m}^{2}}\] each, are at a separation of 0.1 m. If the electric field between the plates is 100 N/C, the magnitude of chargen on each plate is:

    A) \[7.85\times {{10}^{-10}}C\]    

    B) \[6.85\times {{10}^{-10}}C\]

    C) \[8.85\times {{10}^{-10}}C\]    

    D) \[9.85\times {{10}^{-10}}C\]

    Correct Answer: C

    Solution :

    \[E=\frac{q}{A{{\varepsilon }_{o}}}\] \[\Rightarrow \]   \[q=EA{{\varepsilon }_{o}}\] \[\Rightarrow \]   \[q=100\times 1\times 8.85\times {{10}^{-12}}\] \[\Rightarrow \]   \[q=8.85\times {{10}^{-10}}C.\]


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