J & K CET Engineering J and K - CET Engineering Solved Paper-2013

  • question_answer
    The net electric force on a charge of \[+3\mu C\] at the mid-point on the line joining two charges of magnitude \[+2\mu C\] and \[-2\mu C\] separated by the distance of \[6mm,\]is

    A)  \[6000\,N\]

    B)  \[500\,N\]

    C)  \[60\,N\]

    D)  zero

    Correct Answer: D

    Solution :

    From Coulomb's law Force due-to same charge is repulsive and that due to opposite is attractive. \[F=K\left[ \frac{2\times 3}{{{3}^{2}}}-\frac{2\times 3}{{{3}^{2}}} \right]=0\]


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