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MGIMS WARDHA MGIMS WARDHA Solved Paper-2014

  • question_answer
    Two point charges\[+q\]and\[+4q\]are located at \[x=0\]and\[x=L\]respectively. The location of a point on the\[x-\]axis at which the net electric field due to these two points charges is zero, is

    A)  \[L/3\]                                

    B)  \[2L\]

    C)  \[4L\]                                  

    D)  \[8L\]

    Correct Answer: A

    Solution :

                    The location of a point on the\[x-\]axis, at which the net electric field due to these two point charges is zero, from \[+{{q}_{1}},\]charge is\[=\frac{L}{1+\sqrt{\frac{{{q}_{2}}}{{{q}_{1}}}}}=\frac{L}{1+\sqrt{\frac{4q}{q}}}=\frac{L}{3}\]


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