Question

when we rub two objects together they become electrically charged .where did this electric charge come from?

Answer 1

The Electric charge is generated from the molecules of the bodies. They experience Electrostatic force of attraction due to the rubbing.
For example Rubbing of comb and then attraction of small pieces of paper to it.

Hope you get your answer.

Answer 2

Answer:

when electrons are transferred to or removed from an object. Because electrons have a negative charge, when they are added to an object, it becomes negatively charged. When electrons are removed from an object, it becomes positively charged