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Re: Charged disk; was electrostatic ...

Can somebody answer this question? Suppose the electrified
object is like a pear. Or more exactly it is a set of two spherical
segments connected smoothly with a truncated cone. Let the
left segment have R1=20 cm, the right segment R2=5 cm and
the distance between the centers of segments 30 cm. There is
nothing special about this geometry; it is an illustration.

We all known that concentration of charges will be higher on
the right "pole" than on the left "pole". But how many times
larger? Factor of 4? Factor of 16? Neither of the above? Is
there any rule of thumb about this?

The answer will be nearer to 4 than to 16, but it is also well
known that if you wish to solve this problem you must do so