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physics

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if 3e charge is at the origin and the magnesium nucleus is 3cm from the origin in the +x direction, at what position along the x- axis should an electron be placed so that the electron experiences no net force?

  • physics -

    What you are really asking is where to put a 1 e charge to exactly balance a 3 e located charge at the origin if we are standing at x = 3 holding charge q

    F/q = k Q1 /r^2
    F/q to left = k (-3)/9

    F/q to right = k (-1)/(x-3)^2

    so
    1/(x-3)^2 = 1/3
    (x-3)^2 = 3
    x-3 = sqrt 3
    x = 3 + sqrt 3

  • physics -

    IS 1

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