Why do two same charges++or--repulse each other and why do two different charges+-or-+attractive each other? Why does the vice-versa of this condition will not possible?
A charged body has an “electric field” around it. The electric field is the region around a charged body, where other charged particles experience a force. Electric field lines originate from the positive charge and terminate on the negative charge. When two charges come close, the field lines interact. As a result, if the charges are unlike, the field lines combine together and give rise to the attraction between the charges. If the charges are of same polarity, the field lines are moving in opposite directions and give rise to the repulsive force between the charges.