Explain the charging by induction in terms of movement of electrons.
Let uncharged conductor B mounted on an insulated stand is placed near positively charged conductor Amounted on an insulated stand without touching.
Electrons which are equal in number of protons in uncharged B are attracted towards positively charged A. Hence end E is charged negatively called BOUND CHARGE and protons remain at end F of B is positively charged called FREE charge:
This induced charge remains on B so long as body A remains near B.