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JEE Main & Advanced Physics Electrostatics & Capacitance Question Bank Charge and Coulombs Law

  • question_answer
    Two electrons are separated by a distance of 1Å. What is the coulomb force between them                                        [MH CET 2002]

    A)            \[2.3\times {{10}^{-8}}\]N     

    B)            \[4.6\times {{10}^{-8}}\]N

    C)            \[1.5\times {{10}^{-8}}\]N     

    D)            None of these

    Correct Answer: A

    Solution :

                 \[F=9\times {{10}^{9}}\times \frac{{{Q}^{2}}}{{{r}^{2}}}\]\[=9\times {{19}^{9}}\times \frac{{{(1.6\times {{10}^{-19}})}^{2}}}{{{({{10}^{-10}})}^{2}}}=2.3\times {{10}^{-8}}N\]


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