Created By : Naaz Fatima

Reviewed By : Rajashekhar Valipishetty

Last Updated : Apr 10, 2023

Coulomb's Law Calculator is a handy tool to evaluate the attractive or repulsive force between two static charged particles. All you need to do is provide the respective charges q1, q2, distance between them, and click the calculate button to obtain electric force quickly.

Charges are...
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Charge(q1 & q2):
Distance(r):
Force:

### What is meant by Coulomb's Law?

Force of attraction or repulsion between two charged bodies is directly proportional to product of their charges and inversely proportional to the square of the distance between them. Coulomb's Law also known as Coulomb's Inverse Square Law is a law of physics that quantifies the force between two stationary electically charged bodies or particles. Units of Electric Charge is Coulomb and is denoted by the Symbol C.

### Coulomb's Law Formula

Coulomb's Law also known as Coulomb's Inverse Square Law is used to determine the electrostatic force between two charged bodies. Force acts along the shortest line that connects the charges. It is repulsive if both the charges are having same sign and attractive if they have opposite signs. Coulomb's Law Formula is given by the equation F = keqΓéüqΓéé/r┬▓

• Where F is the Electrostatic Force between Charges and expressed in units Netwons
• qΓéü is the magnitude of first charge and expressed in units Coulombs
• qΓéé is the magnitude of second charge and expressed in units Coulombs
• r is the shortest distance between objects with units m
• ke is the coulomb's constant and is equal to 8.98755 ├ù 10Γü╣ N┬╖m┬▓/C┬▓

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### How to Calculate Electrostatic Force using Coulomb's Law?

We can determine the electrostatic force between two objects easily if you know the distance between them. Force F is defined as the product of coulomb's constant, qΓéü times the other charge qΓéé divided by the square of the distance between them. i.e. F = keqΓéüqΓéé/r┬▓

Rearranging the Coulomb's Law we can calculate the distance between objects i.e. r = ΓêÜ (ke ├ù qΓéü ├ù qΓéé / F)

If electrostatic charge of one object, force, distance between them is known, then you can calculate the other charge using the formula qΓéé = (F*r┬▓)/(ke ├ù qΓéü)

### Limitations of Coulomb's Law

There are several limitations for coulomb's law and we have explained all of them in detail for your idea. They are along the lines

• Coulombs Law is applicable for the charges at rest only.
• It can be applied in the cases where inverse square law is obeyed.
• It is difficult to apply coulombs' law for the charges in arbitrary shapes as we can't figure out the distance between them.
• We can't use this law directly to find out the charges on big planets.

### Frequently Asked Questions on Coulomb's Law Calculator

1. What is Coulomb's Law?

Coulomb's Law states that the force of attraction or repulsion between two charged bodies is directly proportional to product of their charges and inversely proportional to square of distance between them.

2. What is the Unit of Electric Charge?

The Unit of Electric Charge is Coulomb.

3. What are the Limitations of Coulomb's Law?

Limitations of Coulomb's Law is that it is applicable only to the point charges at rest, charges that are in arbitrary shape. We can't calculate the charge on big planets.

4.What is the Formula for Coulomb's Law?

The Formula for Coulomb's Law is F = keqΓéüqΓéé/r┬▓