Electrostatics 101: Understanding the Basics

Thiyagu Arunachalam
3 min readJan 26


How to Ace Your Electrostatics Exam?

If you’re taking an electrostatics exam, then you need to know how to ace it. This blog post will give you a crash course in electrostatics, from understanding the basics of what it is and how it works to reviewing common concepts, and finally applying those concepts to solving problems.

With this knowledge under your belt, you’ll be able to confidently take on any electrostatics exam.

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Understand what electrostatics is and how it works.

What is electrostatics?

Electrostatics is the study of electricity, specifically stationary or slow-moving charges. This area of physics deals with objects that are electrically charged, either by contact or by induction.

It also covers the forces that these charges exert on each other, as well as the force that they exert on electric fields.

How does electrostatics work?

The behaviour of electric charges is governed by Coulomb’s law, which states that the force between two charges is proportional to the product of their charges and inversely proportional to the square of the distance between them.

This law applies to both positive and negative charges, and it explains why oppositely charged objects are attracted to each other while objects with the same charge repel each other.

The force exerted by an electric field on a charge is called the Electric force. The strength of this force is given by the equation F=qE, where q is the charge and E is the electric field strength. The direction of this force is perpendicular to both the charge and the field lines.

The potential energy of a system of charges is called the Electric potential energy. It represents the work done in bringing the charges from infinity to their current position in the presence of an electric field. The SI unit forElectricpotentialenergyis joules(J).

Review common electrostatics concepts.

Section 2 of the blog covers common electrostatics concepts that students should review before their exam.

The first concept is Coulomb’s law, which states that the force between two charged particles is proportional to the product of their charges and inversely proportional to the square of the distance between them.

The second concept is electric fields, which are created by charges and cause other charges to experience a force.

The third concept is electric potential, which is the amount of work required to move a charge from one point to another in an electric field.

Know how to apply electrostatics concepts.

To solve electrostatics problems, you need to understand the concepts and be able to apply them.

First, identify what quantities are given and what you need to find.

Second, draw a diagram of the situation.

Third, choose the equation or equations that you will use to solve the problem.

Fourth, substitute in the values and solve for the unknown quantity.

Fifth, check your answer to make sure it makes sense physically and mathematically.

There are some common mistakes that students make when solving electrostatics problems:

  • Not drawing a diagram
  • Not identifying all of the given quantities
  • Misinterpreting the information given in the problem
  • Choosing the wrong equation
  • Incorrectly applying the concepts

Tips and tricks:

Here are some tips and tricks for solving electrostatics problems:

-Start by reviewing the concepts so that you understand how they work.

-Make sure you can identify all of the given quantities in a problem.

-Draw a diagram of the situation before choosing which equation to use.

-Solve one variable at a time and check your answers along the way.

-If you get stuck, try looking at similar problems or asking your teacher or tutor for help.


Ace your electrostatics exam by understanding what electrostatics is and how it works. Review common electrostatics concepts like Coulomb’s law, electric fields, and electric potential. Know how to apply these concepts by solving problems and using tips and tricks.



Thiyagu Arunachalam

Hi there! I'm a science and technology enthusiast with a passion for writing about the latest developments in the fields of science and coding.