I think understand the concept of the "method of images" to describe a conductor. The conductor has to be an equipotential or else electrons would be moving around inside it. This equipotential can be described by replacing the conductor with an image charge.(adsbygoogle = window.adsbygoogle || []).push({});

For example imagine the field lines of a positive charge at a distance +x in front of a grounded vertical conductor in the y-z plane. The conductor can be represented by a negative image charge placed at position -x. The combined system of charge and image charge has a zero volt equipotential in the y-z plane as required.

Now imagine a positive charge anywhere inside a grounded conducting sphere.

Can the grounded conducting sphere be represented by a negative image charge placed directly over the positive charge? I guess it can as in such a situation all closed surfaces around such a system of charges will be at zero volts.

John

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# Image charge inside a conducting sphere

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