(a) Write an expression for the magnitude of the electric field at a point (x, 0) on...

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(a) Write an expression for the magnitude of the electric field at a point (x, 0) on a line perpendicular to the dipole axis. State the direction of the field for x > 0 and for x < 0. 

(b) Show that when x ≫ d, E ≈ kqd/x3

(c) The field is inversely proportional to the distance cubed. Does this conflict with Coulomb’s law? Explain.

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