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A solid copper sphere has a radius of R and holds a net charge of +Q....

A solid copper sphere has a radius of R and holds a net charge of +Q.

You measure outward a distance of D from the center of the sphere.

(assume D>R)

You measure the magnitude of the electric field at distance D.

You then measure out to a distance of 3D from the center of the sphere and measure again.

How does the magnitude of the electric field at distance 3D compare to that of D?

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