Problem

Three charges (+q, -2q, and +q) are arranged along the z-axis at z = d/2, z = 0, and z = -...

Three charges (+q, -2q, and +q) are arranged along the z-axis at z = d/2, z = 0, and z = -d/2,respectively.

a) Determine V and E at a distant point P(R, θ, ϕ).


b) Find the equations for equipotential surfaces and streamlines.


c) Sketch a family of equipotential lines and streamlines.

(Such an arrangement of three charges is called a linear electrostatic quadrupole.)

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