Physics

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Two charges +q and −q are separated by a distance d=50 cm. The electric field lines for this system form the the well-known pattern showed in the figure below. Consider two lines L1 and L2 lying on the same plane and leaving the positive charge at α=±45∘. What is the maximum distance D between the lines in centimeters.

  • Physics -

    use diff eq. with coulombs law E = kq/r^2 r^

    Solve dy/dx = E_net,y/E_net,x

  • Physics -

    thats not a good technique as DE will get too complicated

  • Physics -

    what are the steps to solve this??

  • Physics -

    is the answer 25?

  • Physics -

    why?

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