sir when some posive charge and and negative charge are placed will they can cel each others affect. if it is then hw current flows

Electric currents are not always flows of electrons, they can be flows of any type of electric charge. It depends on the type of conductor. Both protons and electrons possess exactly the same amount of 'electricity.' If either the protons or the electrons flow, that flow is an electric current.

What is about the misconception:-
Positive charge is not made of "missing electrons." Positive charge is a genuine type of charge in its own right. Yes, when protons and electrons are near each other, their charges cancel. Removing the electrons exposes the charge on the protons, and that's probably where this particular misconception originates. Since neutral atoms receive a positive imbalance of charge when their electrons are removed, is seems like positive charge is nothing but missing electrons. But this is wrong.