(ii) The Possible values of electric charge are q = ± 1e ± 2e ± 3e. (i) Electric charge can exist only as an integral multiple of charge on an electron (-e) i.e. Two important properties of charge are Quantization and Conservation.Charge on electron is -1.602 * 10 -19 C and charge on proton is positive of this value.1 Coulomb is the charge flowing through the wire in 1 second if the electric current in it is 1A.SI unit of charge is Coulomb written as C.Charge on a system can be measured by comparing it with the charge on a standard body.Importance of electric forces is that it encompasses almost each and every field associated with our life being it matter made up of atoms or molecules in which electric charges are exactly balanced or adhesive forces of glue associated with surface tension, all are electric in nature.Assignment of negative charge on electron and positive charge on proton is purely conventional it does not mean that charge on electron is less than that on proton.e., both set repel each other but electric force between an electron and proton placed at same distance apart is not repulsive but attractive in nature. Electric force between two electrons is same as electric force between two protons kept at same distance apart i.Actually nucleus is made of protons and neutrons but neutrons are uncharged particles. Electrons are negatively charged particles and protons, of which nucleus is made of, are positively charged particles.Electric charge is the property responsible for electric forces which acts between nucleus and electron to bind the atom together.Electric charge is a fundamental property like mass, length etc associated with elementary particles for example electron, proton and many more.Where I is the electric current and t is the time (duration).

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