Conservation of charge and electron flow?

[HMS-776]

I am trying to understand the conservation of charge regarding electron flow through a charged body.

Is there any thing about the conservation of charge which explains that if a body is charged and electrons leave the body the same amount of electrons must enter it to conserve it's charge?

What if the body was given a charge by an applied circuit, and was then put in a conductive medium? Would the amount of electrons leaving the body equal the amount of electrons which enter it? If so, could you control the amount of electrons which leave the body by limiting the electrons which enter it, even though the body was placed in a conductive medium?

 

[zhermes]

Is there any thing about the conservation of charge which explains that if a body is charged and electrons leave the body the same amount of electrons must enter it to conserve it's charge?

In general, no. Conservation of charge simply says that if the charge of the body is decreasing (or increasing) then charge must be leaving (or entering) the body. It doesn't mean that the charge of a single object must be conserved, it means that the total charge in the system must be conserved.

If the charge of an individual body was always conserved... there would be no way to charge it in the first place.

Does that answer your question?