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12th Class Physics Electrostatics & Capacitance Question Bank Case Based (MCQs) - Electrostatic Potential and Capacitance

  • question_answer
    The mutual electrostatic potential energy between two protons which are at a distance of \[9\times {{10}^{-15}}m\], in \[_{92}{{U}^{235}}\]nucleus is:

    A) \[1.56\,\times {{10}^{-14}}J\]  

    B) \[5.5\times {{10}^{-14}}J\]

    C) \[2.56\times {{10}^{-14}}J\]    

    D) \[4.56\times {{10}^{-14}}J\]

    Correct Answer: C

    Solution :

    (c) \[2.56\times {{10}^{-14}}J\] \[U=\frac{1}{4\pi {{\varepsilon }_{0}}}\frac{{{q}_{1}}{{r}_{2}}}{r}\] \[=\frac{9\times {{10}^{9}}\times 1.6\times {{10}^{-19}}\times 1.6\times {{10}^{-19}}}{9\times {{10}^{-15}}}=2.56\times {{10}^{-14}}J\]


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