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A disk of radius 0.002 m has a nonuniform surface charge density σ = Ar, where A
1.1 µC/m³ is a constant and r is measured from the center of the disk to a point on
the surface of the disk. Find (by direct integration) the electric potential at P (x =
0.007 m). State your answer in the nearest hundredth.
Take k=8.99x10°N/C.
=
=

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