I know its not possible to find a centre of charge for neutral bodies as net charge on them =0, which will make the quantity undefined. But my textbook says,
"centre of collection of positive charges is defined much the same way as centre of mass."
Is this correct?
So if if we say there is a ring with half ring as negatively charged and the other half positively charged, can we assume 2 centres of charges (1 each for positive and negative charge distribution) for calculation of electric field at a point, say the centre of the ring?
Note: I don't have any idea about quadrupole and such concepts, and I'd really appreciate if the argument could be kept at the basic level.
This Link also discusses this aspect, but i don't understand most of the answers.