TWO KINDS OF CHARGES

Till  now we have discussed about the extra Force called ELECTRIC FORCE and property responsible fro these force is CHARGE . Now we will try to look at their natures . The electric force between the two Electrons is the same as the electric force between the two Protons . With the help of above statement we can conclude that the strength existing between two electrons is the same as the strength existing between two protons .

       
                   Now we may guess that the amount of charge in an electron is  the same as the amount of charge in a proton . if you keep one electron and one proton in a box then they attract  each other with the same force as they repel . Since , here the force is repulsive not attractive . we came to a conclusion that the charge on an electron repels the charge on another electron but attracts the charge on a proton . It seems that amount of charge is same but of opposite nature . We arbitrarily for the purpose of convention call charge on an electron as negative and charge on a proton as positive.

                 
               It doesn't mean charge on a proton is more because it is positive and charge on an electron is less because its negative , the convention is purely made for the representation of their OPPOSITE NATURE . If we pack a proton and an electron in a box then bring another electron in the box at a distance then we see that there is no change in the electron proton system which means that the new electron brought near to this system doesn't gets pulled or pushed by this electron-proton system .

              The above system shows the possibility of Net charge , positive charge and negative charge .