(i) On rubbing two objects together they become electrically charged due to the fact that the frictional charging takes place between them.

(ii) The atoms are composed of many charged particles like electrons, neutrons, protons, etc. as identified by J.J Thompson.

(iii) The charges are already not present in the objects because, in the atoms the positively charged particles that are protons are equal in number to the negatively charged electrons which leads to the cancelation of their respective charges.

(iv) So any object is electrically neutral. The electrons are somewhat loosely packed than protons.

(v) On rubbing the two different objects there is transfer of the electrons between them due to which there is increase of electrons in one of the objects and decrease in the other which disturbs the equal charge in an atom which appears as the charge on the object.