In my books,Principle of Physics(Grade XI),it shows the process of charging a conductor positively or negatively by induction.At the last picture,when the charge is completed it says'The positive or negative charge left in a conductor spread unifromly across the conductor.Hence the conductor is negatively/positively charged depending on case'.
My questions are:
How can body be charge positively?I know that some electrons in surface can leave out but how can the all the electrons,those in the middle also,leave the conductor and make it positively charged?Atleast the picture in my books shows a long pipe conductor with only + charge all across the surface
How can body be charged negatively? Where do the protons go? Please help !!