Source of image: Fundamentals of Physics extended fifth edition by Halliday, Resnick and Walker. Concerned to First Paragraph.
Why in the rejected scheme, Spheres are supposed to go neutral (or become discharged) when connected to a conductor?
Just after that is written ", bringing them quickly to the same potential." I do not understand what author is trying to say. Does he mean that electrons, first, would move to the negative terminal and would cancel its charge (making this terminal neutral) and then make this terminal positively charged so that both the given terminals become positive (reach to same potential)? Is that what he is trying to say?
If this is what he is trying to deliver, I have trouble. Because, I can not understand what kind of spheres he is talking about. What does he exactly mean by "conducting spheres"? I am taking it as a normal sphere which is already somewhat filled with charge carriers before being connected to the conductor but I really doubt if I am right.