If you are AIEEE student and preparing for your exams, You can download this pdf on electrostatics. You will learn more about electrostatics.
These topics are in this pdf:

Electric charge
Coulomb’s law
Electrostatics field
Electrostatics lines of force; Properties
Electric field due to a point charge
Superposition of Electric field
Electric field intensity on the axis of a uniformly charged ring
Electric flux
Gauss’s Law
Application of Gauss’s